Leeds Northrup

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NEW Leeds  Northrup Amplifier Prod No 801208
NEW Leeds Northrup Amplifier Prod No 801208
$175.00
quality
Leeds Northrup Thermal Conductivity Analyser Model 7866 2 yr warranty
Leeds Northrup Thermal Conductivity Analyser Model 7866 2 yr warranty
$299.00
quality
LEEDS  NORTHRUP VIDEO RECORDER
LEEDS NORTHRUP VIDEO RECORDER
$300.00
quality
LEEDS  NORTHRUP SODIUM ANALYZER 7082 34 056494 120 240V
LEEDS NORTHRUP SODIUM ANALYZER 7082 34 056494 120 240V
$200.00
quality
Leeds  Northrup Chart Recorder Paper 490912 01 001 Lot of Rhree
Leeds Northrup Chart Recorder Paper 490912 01 001 Lot of Rhree
$19.95
quality
Leeds  Northrup 1 ohm resistor part  4221
Leeds Northrup 1 ohm resistor part 4221
$349.99
quality
VINTAGE LEEDS  NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
VINTAGE LEEDS NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
$150.00
quality
Leeds  Northrup P N 3061 2 T 2 2 00 2 0 1 Thermocouple Steel 4 1 2 Indicator
Leeds Northrup P N 3061 2 T 2 2 00 2 0 1 Thermocouple Steel 4 1 2 Indicator
$57.00
quality
LEEDS  NORTHRUP 117484 DIFFUSION ELECTRODE
LEEDS NORTHRUP 117484 DIFFUSION ELECTRODE
$9.99
quality
Leeds  Northrup Control Station Model A Cat No 423 21 10 MAX S
Leeds Northrup Control Station Model A Cat No 423 21 10 MAX S
$78.00
quality
Leeds  Northrup Parts Catalog 179006 Speedomax G Model 60000 Series
Leeds Northrup Parts Catalog 179006 Speedomax G Model 60000 Series
$25.00
quality
Leeds  Northrup Control Station Model A Cat No 423 21 10
Leeds Northrup Control Station Model A Cat No 423 21 10
$78.00
quality
Vintage Leeds  Northrup Co PHILADELPHIA TEST EQUIP CASEMENT WITH MAHOGANY
Vintage Leeds Northrup Co PHILADELPHIA TEST EQUIP CASEMENT WITH MAHOGANY
$199.99
quality
Leeds  Northrup Manual For Speedomax G Recorders Model S 60000 Series
Leeds Northrup Manual For Speedomax G Recorders Model S 60000 Series
$25.00
quality
Leeds  Northrup 4040B NBS Type Resistance standards 10 kohms
Leeds Northrup 4040B NBS Type Resistance standards 10 kohms
$395.00
quality
Leeds  Northrup Testing  Servicing Manual For Amplifiers Used In Speedomax G
Leeds Northrup Testing Servicing Manual For Amplifiers Used In Speedomax G
$25.00
quality
Vintage LEEDS  NORTHRUP Testing Unit With Oak Case
Vintage LEEDS NORTHRUP Testing Unit With Oak Case
$48.00
quality
VINTAGE LEEDS  NORTHRUP POTENTIOMETER
VINTAGE LEEDS NORTHRUP POTENTIOMETER
$275.00
quality
VINTAGE LEEDS  NORTHRUP POTENTIOMETER
VINTAGE LEEDS NORTHRUP POTENTIOMETER
$175.00
quality
VINTAGE LEEDS  NORTHRUP POTENTIOMETER
VINTAGE LEEDS NORTHRUP POTENTIOMETER
$275.00
quality
Leeds  Northrup D C Null Detector
Leeds Northrup D C Null Detector
$75.00
quality
NEW LEEDS NORTHRUP RAYTUBE TEMPERATURE DETECTOR 18890 918MV  1800F
NEW LEEDS NORTHRUP RAYTUBE TEMPERATURE DETECTOR 18890 918MV 1800F
$249.99
quality
Leeds  Northrup Thermocouple Conduit Connection 1 2 X 3 4 FNPT NEW
Leeds Northrup Thermocouple Conduit Connection 1 2 X 3 4 FNPT NEW
$50.00
quality
NEW NOS Leeds  Northrup Reservoir 117034 FREE SHIPPING
NEW NOS Leeds Northrup Reservoir 117034 FREE SHIPPING
$29.99
quality
Leeds  Northrup Coil Resister R 7 PP Vintage R 7 K 40 FREE SHIPPING
Leeds Northrup Coil Resister R 7 PP Vintage R 7 K 40 FREE SHIPPING
$17.99
quality
Leeds  Northrup LN 7073 6 101316 Electrode Transmitter Directions 177686 D
Leeds Northrup LN 7073 6 101316 Electrode Transmitter Directions 177686 D
$24.99
quality
Leeds  Northrup LN 7773 Mounting Assembly Directions 177724 Rev G 3309a2
Leeds Northrup LN 7773 Mounting Assembly Directions 177724 Rev G 3309a2
$20.00
quality
Leeds  Northrup LN 7075 1 7075 2 Monitors Directions 177692 Rev E 3309a2
Leeds Northrup LN 7075 1 7075 2 Monitors Directions 177692 Rev E 3309a2
$24.99
quality
Leeds  Northrup LN 4973 Series Conductivity Cells Manual 277067 rev A 3309a2
Leeds Northrup LN 4973 Series Conductivity Cells Manual 277067 rev A 3309a2
$25.00
quality
Leeds  Northrup LN 4905 Series Conductivity Cells Directions 177667 issue 5
Leeds Northrup LN 4905 Series Conductivity Cells Directions 177667 issue 5
$24.99
quality
Leeds  Northrup LN Speedomax H Manual 077990 Issue 20 3309a2
Leeds Northrup LN Speedomax H Manual 077990 Issue 20 3309a2
$25.00
quality
Leeds  Northrup LN Speedomax W Directions 177232 Issue 6
Leeds Northrup LN Speedomax W Directions 177232 Issue 6
$25.00
quality
Leeds  Northrup LN Speedomax H  W Directions 177304 Issue 9 3309a2
Leeds Northrup LN Speedomax H W Directions 177304 Issue 9 3309a2
$24.99
quality
Leeds  Northrup LN Speedomax H  W Directions 177304 Rev j 3309a2
Leeds Northrup LN Speedomax H W Directions 177304 Rev j 3309a2
$25.00
quality
Pyrometer instrument mfg by Leeds  Northrup aircraft thermocouple tester
Pyrometer instrument mfg by Leeds Northrup aircraft thermocouple tester
$25.00
quality
Leeds  Northrup 4775 Enclosed switch DC Resistance box 0 99990 Ohms vintage
Leeds Northrup 4775 Enclosed switch DC Resistance box 0 99990 Ohms vintage
$2.25
quality
Wheatstone Bridge Leeds And Northrup Co Type 4289
Wheatstone Bridge Leeds And Northrup Co Type 4289
$10.00
quality
LEEDS  NORTHRUP 4035 1000 OHM 1K OHM STANDARD RESISTOR
LEEDS NORTHRUP 4035 1000 OHM 1K OHM STANDARD RESISTOR
$225.00
quality
Leeds  Northrup Manual 7552 Potentiometer Operating Directions w Schematics
Leeds Northrup Manual 7552 Potentiometer Operating Directions w Schematics
$17.10
quality
Vintage Leeds and Northrup Potentiometer
Vintage Leeds and Northrup Potentiometer
$199.00
quality
LEEDS  NORTHRUP PRESSURE TRANSMITTER 2610 100 11 2 00 206 NEW 261010011200206
LEEDS NORTHRUP PRESSURE TRANSMITTER 2610 100 11 2 00 206 NEW 261010011200206
$179.99
quality
LEEDS  NORTHRUP 2610 100 11 0 01 809 NEW 261010011001809
LEEDS NORTHRUP 2610 100 11 0 01 809 NEW 261010011001809
$369.99
quality
Leeds Northrup 2195 Reflecting Galvanometer Scale Lamp Stand
Leeds Northrup 2195 Reflecting Galvanometer Scale Lamp Stand
$142.49
quality
Vintage Leeds  Northrup Volt Box Cat 7592 750 Ohms Volt Test Equipment GG
Vintage Leeds Northrup Volt Box Cat 7592 750 Ohms Volt Test Equipment GG
$7.67
quality
Leeds  Northrup Electrical Instruments Catalog A Measuring Testing Calibrating
Leeds Northrup Electrical Instruments Catalog A Measuring Testing Calibrating
$29.99
quality
Vintage Test Set Leeds  Northrup LN K2 Potentiometer Movie Prop
Vintage Test Set Leeds Northrup LN K2 Potentiometer Movie Prop
$59.00
quality
LEEDS  NORTHRUP OUTPUT BOARD 046315 NEW NO BOX
LEEDS NORTHRUP OUTPUT BOARD 046315 NEW NO BOX
$70.00
quality
LEEDS  NORTHRUP 4030B TERMINAL RESISTOR 100 OHMS
LEEDS NORTHRUP 4030B TERMINAL RESISTOR 100 OHMS
$94.99
quality
Directions for STRIP CHART RECORDERS with MICROMAX MECHANISM Leeds Northrup
Directions for STRIP CHART RECORDERS with MICROMAX MECHANISM Leeds Northrup
$7.97
quality
Leeds  Northrup Zero Voltage Power Pack
Leeds Northrup Zero Voltage Power Pack
$10.04
quality
NEW LEEDS NORTHRUP 7082 14 056420 120 240V AC 15VA CONDUCTIVITY ANALYZER D557143
NEW LEEDS NORTHRUP 7082 14 056420 120 240V AC 15VA CONDUCTIVITY ANALYZER D557143
$300.00
quality
Leeds  Northrup Co 2104 Mirror Support Bracket Screw  Washer For Galvanometer
Leeds Northrup Co 2104 Mirror Support Bracket Screw Washer For Galvanometer
$5.00
quality
Leeds  Northrup Co Lens Types K HS and P For Galvanometer STD 587 A
Leeds Northrup Co Lens Types K HS and P For Galvanometer STD 587 A
$4.00
quality
Leeds  Northrup Century 464 Controller Transmitter Calibration Test Set Used
Leeds Northrup Century 464 Controller Transmitter Calibration Test Set Used
$499.99
quality
Leeds  Northrup Company STD 663 EC Galvanometer Suspension Coil NOS
Leeds Northrup Company STD 663 EC Galvanometer Suspension Coil NOS
$60.00
quality
Leeds  Northrup Company STD 661 C Galvanometer Suspension Coil NOS
Leeds Northrup Company STD 661 C Galvanometer Suspension Coil NOS
$60.00
quality
Leeds  Northrup Company STD 664 AC Galvanometer Suspension Coil NOS
Leeds Northrup Company STD 664 AC Galvanometer Suspension Coil NOS
$60.00
quality
Leeds  Northrup 324071 Potentiometer Rebuild Kit 016069
Leeds Northrup 324071 Potentiometer Rebuild Kit 016069
$29.99
quality
LEEDS  NORTHRUP THOMAS 1 ONE OHM 4210 STANDARD WITH METAL CASE
LEEDS NORTHRUP THOMAS 1 ONE OHM 4210 STANDARD WITH METAL CASE
$399.98
quality
LEEDS  NORTHRUP 660055 H Chart Paper Lot of 3
LEEDS NORTHRUP 660055 H Chart Paper Lot of 3
$24.99
quality
LN LEEDS  NORTHRUP 046313 REVISION F F1  CIRCUIT BOARD NEW 221234
LN LEEDS NORTHRUP 046313 REVISION F F1 CIRCUIT BOARD NEW 221234
$187.00
quality
Leeds  Northrup BIF 20265 11 01 01 01 L1609 01 L1609 01 000 Level Indicator
Leeds Northrup BIF 20265 11 01 01 01 L1609 01 L1609 01 000 Level Indicator
$59.95
quality
LEEDS  NORTHRUP 7082 16 056422 120 240 VAC 15 VA ANALYZER
LEEDS NORTHRUP 7082 16 056422 120 240 VAC 15 VA ANALYZER
$169.50
quality
Vintage Leeds  Northrup 8690 2 Millivolt Potentiometer Thermocouple W Manual
Vintage Leeds Northrup 8690 2 Millivolt Potentiometer Thermocouple W Manual
$59.99
quality
Leeds  Northrup MilliVolt Potentiometer 8691 8691 2
Leeds Northrup MilliVolt Potentiometer 8691 8691 2
$116.96
quality
LEEDS  NORTHRUP 080667 CIRCUIT BOARD FOR CHART RECORDER 3 CHANNEL INPUT NEW 99
LEEDS NORTHRUP 080667 CIRCUIT BOARD FOR CHART RECORDER 3 CHANNEL INPUT NEW 99
$79.20
quality
LEEDS NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
LEEDS NORTHRUP CENTURY 464 CONTROLLER TRASMITER CALIBRATION TEST
$185.00
quality
NEW Leeds  Northrup Front Mechanism For Micromax Recorder 352343 R 203 1
NEW Leeds Northrup Front Mechanism For Micromax Recorder 352343 R 203 1
$99.95
quality
leeds northrup 8692 2 Temperature Potentiometer
leeds northrup 8692 2 Temperature Potentiometer
$0.01
quality
Leeds  Northrup Speedomax Recorder
Leeds Northrup Speedomax Recorder
$99.99
quality
Lot of 2 Leeds  Northrup Speedomax W Chart Paper NEW
Lot of 2 Leeds Northrup Speedomax W Chart Paper NEW
$2.80
quality
RX 2310 LEEDS  NORTHRUP 7076 1 200 120 001 000
RX 2310 LEEDS NORTHRUP 7076 1 200 120 001 000
$199.00
quality
RX 2311 LEEDS  NORTHRUP 7076 1 200 120 001 000
RX 2311 LEEDS NORTHRUP 7076 1 200 120 001 000
$199.00
quality
Leeds  Northrup No P N Crimp Tool w Die No P N USED
Leeds Northrup No P N Crimp Tool w Die No P N USED
$49.88
quality
LOT OF 22 NEW LEEDS  NORTHRUP ELECTRICAL CONTACT 029348 FOR SELECTOR SWITCH
LOT OF 22 NEW LEEDS NORTHRUP ELECTRICAL CONTACT 029348 FOR SELECTOR SWITCH
$195.00
quality
Leeds  Northrup Red Type K 68 C Chart Data Recorder Instrument K68
Leeds Northrup Red Type K 68 C Chart Data Recorder Instrument K68
$99.99
quality
Calibrator Tester Leeds  Northrup 4775 Vintage Laboratory Equipment
Calibrator Tester Leeds Northrup 4775 Vintage Laboratory Equipment
$20.00
quality
Leeds  Northrup Millivolt Potentiometer Cat No 8691 Galvanometer
Leeds Northrup Millivolt Potentiometer Cat No 8691 Galvanometer
$15.00
quality
Leeds  Northrup 2660 102 12 0 01 000 Pressure Transmitter
Leeds Northrup 2660 102 12 0 01 000 Pressure Transmitter
$164.99
quality
Leeds  Northrup 10 OHM Resistance Standard FE8
Leeds Northrup 10 OHM Resistance Standard FE8
$143.98
quality
Leeds  Northrup Cat No 9847 Vintage Test Equipment
Leeds Northrup Cat No 9847 Vintage Test Equipment
$79.95
quality
Leeds  Northrup Instruments 7082 10 056315 PH Analyzer ELE2911
Leeds Northrup Instruments 7082 10 056315 PH Analyzer ELE2911
$418.00
quality
LEEDS  NORTHRUP 056888 CHEATER CHART RECORDER CABLE ASSEMBLY NEW 49EA
LEEDS NORTHRUP 056888 CHEATER CHART RECORDER CABLE ASSEMBLY NEW 49EA
$39.20
quality
Leeds  Northrup Chart Recorder mdl 201 11 000 NN21
Leeds Northrup Chart Recorder mdl 201 11 000 NN21
$143.98
quality
Leeds  Northrup Flow Pressure Sensor Transmitter 11 48 VDC 4 20Amp ELE3553
Leeds Northrup Flow Pressure Sensor Transmitter 11 48 VDC 4 20Amp ELE3553
$374.00
quality
Vintage Leeds and Northrup Precision Potentiometer Box small
Vintage Leeds and Northrup Precision Potentiometer Box small
$65.00
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER LN1
LEEDS NORTHRUP LN DIGITAL CHART RECORDER LN1
$112.50
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER LN2
LEEDS NORTHRUP LN DIGITAL CHART RECORDER LN2
$75.00
quality
Lot of 8pcs Leeds  Northrup Recorder INK 125162 Blue Super Fast Dry
Lot of 8pcs Leeds Northrup Recorder INK 125162 Blue Super Fast Dry
$24.90
quality
NEW LEEDS NORTHRUP 4905 50 44 333 7 000 CONDUCTIVITY CELL COMPENSATOR D557748
NEW LEEDS NORTHRUP 4905 50 44 333 7 000 CONDUCTIVITY CELL COMPENSATOR D557748
$100.00
quality
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Leeds Northrup

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All My STUFF !!!!!!!!!!!!! Part 18

History Of UK Car Registrations

Number Plate History
brief history of the u.k. car number plate system
"The Motor Car Act 1903" started everything off .It said that every car had to be registered with a county council or county borough council, and every car had to display a unique identifying number issued to them by such a council .
Initially each council was issued one letter to use on the number plates , they could not have known how popular the motor car was to become and as the number of cars increased they quickly ran out of combinations ,so they started to use two and then three letter combinations.
By 1963 several councils were close to the end of their allocation, so a 7th digit was added to the Number Plate System. This extra digit was a letter ,so post 1963 numbers had three letters then a space then up to 3 numbers and then another letter this last letter gave the age of the car.
Suffix Number Plate System
The Suffix Number Plate System
Table of "Age identifier " Suffix Letters.
A 1 Jan 63 - 31 Dec 63 H 1 Aug 69 - 31 Jul 70 R 1 Aug 76 - 31 Jul 77
B 1 Jan 64 - 31 Dec 64 J 1 Aug 70 - 31 Jul 71 S 1 Aug 77 - 31 Jul 78
C 1 Jan 65 - 31 Dec 65 K 1 Aug 71 - 31 Jul 72 T 1 Aug 78 - 31 Jul 79
D 1 Jan 66 - 31 Dec 66 L 1 Aug 72 - 31 Jul 73 V 1 Aug 79 - 31 Jul 80
E 1 Jan 67 - 31 Jul 67 M 1 Aug 73 - 31 Jul 74 W 1 Aug 80 - 31 Jul 81
F 1 Aug 67 - 31 Jul 68 N 1 Aug 74 - 31 Jul 75 X 1 Aug 81 - 31 Jul 82
G 1 Aug 68 - 31 Jul 69 P 1 Aug 75 - 31 Jul 76 Y 1 Aug 82 - 31 Jul 83
You may notice that a further complication to the number system came in 1967 when , under pressure from the motor car industry the changeover date was moved to August in an attempt to smooth out new car puchasing by the public.
It may also be noted that the letters I and Z ( used for N.Ireland) are missing as are Q ( reserved for kit cars and repaired write offs etc) and the letter U ( reason unknown).

The letters I Q Z O and U were never used as a suffix letter in fact I Q and Z were never used at all.
By 1983 they faced the same problem but deftly extended the system by reversing the number plate giving a letter first then up to 3 numbers then a space then 3 more letters. The first letter now gave the age of the car.
Prefix number plate system
The Prefix Number Plate System
Table of "Age identifier " Prefix Letters.
A 1 Aug 83 - 31 Jul 84 H 1 Aug 90 - 31 Jul 91 R 1 Aug 97 - 31 Jul 98
B 1 Aug 84 - 31 Jul 85 J 1 Aug 91 - 31 Jul 92 S 1 Aug 98 - 28 Feb 99
C 1 Aug 85 - 31 Jul 86 K 1 Aug 92 - 31 Jul 93 T 1 Mar 99 - 31 Aug 99
D 1 Aug 86 - 31 Jul 87 L 1 Aug 93 - 31 Jul 94 V 1 Sep 99 - 29 Feb 00
E 1 Aug 87 - 31 Jul 88 M 1 Aug 94 - 31 Jul 95 W 1 Mar 00 - 31 Aug 00
F 1 Aug 88 - 31 Jul 89 N 1 Aug 95 - 31 Jul 96 X 1 Sep 00 - 28 Feb 01
G 1 Aug 89 - 31 Jul 90 P 1 Aug 96 - 31 Jul 97 Y 1 Mar 01 - 31 Aug 01
It may be noted that the letters I and Z ( used for N.Ireland) are missing as are Q ( reserved for kit cars and repaired write offs etc) and the letter U ( reason unknown).

By 2001 the problem was looming again and the current system was introduced. Now each number plate has 7 digits and the first two letters give the region of the country where the car was first registered, followed by two numbers which give the age of the car and then three random letters . An example of this could be NE51 XXX. The NE tells you the car is from the North East of England (a table of these region identifiers is below ). The 51 tells you it was registered in September 2001 and the last three letters mean nothing.
Current Number Plate system
Current U.K. Number Plates System
The first two digits of each car registration denote the area of the country where the vehicle was first registered.
First Letter Issuing office Second Letter Possibilities
A Peterborough A B C D E F G H J K L M N
Norwich O P R S T U
Ipswich V W X Y
B Birmingham A - Y
C Cardiff A B C D E F G H J K L M N O
Swansea P R S T U V
Bangor W X Y
D Chester A B C D E F G H J K
Shrewsbury L M N O P R S T U V W X Y
E Chelmsford A - Y
F Nottingham A B C D E F G H J K L M N P
Lincoln R S T V W X Y
G Maidstone A B C D E F G H J K L M N O
Brighton P R S T U V W X Y
H Bournemouth A B C D E F G H J
Portsmouth K L M N O P R S T U V W X Y
HW Reserved for the Isle of Wight
K Luton A B C D E F G H J K L
Northampton M N O P R S T U V W X Y
L Wimbledon A B C D E F G H J
Stanmore K L M N O P R S T
Sidcup U V W X Y
M Manchester A - Y
N Newcastle A B C D E G H J K L M N O
Stockton P R S T U V W X Y
O Oxford A - Y
P Preston A B C D E F G H J K L M N O P R S T
Carlisle U V W X Y
R Reading A - Y
S Glasgow A B C D E F G H J
Edinburgh K L M N O
Dundee P R S T
Aberdeen U V W
Inverness X Y
V Worcester A - Y
W Exeter A B C D E F G H J
Truro K L
Bristol M N O P R S T U V W X Y
Y Leeds A B C D E F G H J K
Sheffield L M N O P R S T U
Beverley V W X YHave a look at my historic rally blog :-
More Historic Rally Information

My business website :-
Private Number Plates

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