Leeds Northrup

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Leeds  Northrup 4025B 10ohm Leeds  Northrup Resistor 10 Ohm
Leeds Northrup 4025B 10ohm Leeds Northrup Resistor 10 Ohm
$250.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN16
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN16
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN27
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN27
$120.00
quality
LEEDS  NORTHRUP 10000 OHMS ABS RESISTOR LN24
LEEDS NORTHRUP 10000 OHMS ABS RESISTOR LN24
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN20
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN20
$120.00
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER LN3
LEEDS NORTHRUP LN DIGITAL CHART RECORDER LN3
$120.00
quality
LEEDS  NORTHRUP 10 OHM ABS RESISTOR LN28
LEEDS NORTHRUP 10 OHM ABS RESISTOR LN28
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN29
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN29
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN19
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN19
$120.00
quality
LEEDS  NORTHRUP 1000 OHM ABS RESISTOR LN6
LEEDS NORTHRUP 1000 OHM ABS RESISTOR LN6
$120.00
quality
LEEDS  NORTHRUP 1 OHM ABS RESISTOR LN2
LEEDS NORTHRUP 1 OHM ABS RESISTOR LN2
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN3
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN3
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN12
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN12
$120.00
quality
LEEDS  NORTHRUP 10000 OHMS ABS RESISTOR LN18
LEEDS NORTHRUP 10000 OHMS ABS RESISTOR LN18
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN1
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN1
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN11
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN11
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN13
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN13
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN10
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN10
$120.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN14
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN14
$120.00
quality
Leeds  Northrup Millivolt Testing Unit Reactor MTR Real Inst 1138212
Leeds Northrup Millivolt Testing Unit Reactor MTR Real Inst 1138212
$135.00
quality
VINTAGE LEEDS  NORTHRUP 8691 POTENTIOMETER W RUN UP BOX 9912
VINTAGE LEEDS NORTHRUP 8691 POTENTIOMETER W RUN UP BOX 9912
$74.99
quality
LEEDS  NORTHRUP SPEEDOMAX RECORDER S 48 AS IS
LEEDS NORTHRUP SPEEDOMAX RECORDER S 48 AS IS
$17.99
quality
3 Rolls Graphic Controls Leeds  Northrup 661763 T3 Roll Chart Paper
3 Rolls Graphic Controls Leeds Northrup 661763 T3 Roll Chart Paper
$34.32
quality
Leeds  Northrup LN 7875 Oxygen Analyzers Operators  Service Manual 277142 A1
Leeds Northrup LN 7875 Oxygen Analyzers Operators Service Manual 277142 A1
$25.00
quality
LN Potentiometer Leeds  Northrup Vintage In Wooden Case FREE SHIPPING
LN Potentiometer Leeds Northrup Vintage In Wooden Case FREE SHIPPING
$159.99
quality
Leeds  Northrup LN 9912 1 Run Up Box Directions Copy 177359 Issue 1 3309a2
Leeds Northrup LN 9912 1 Run Up Box Directions Copy 177359 Issue 1 3309a2
$25.00
quality
Leeds  Northrup LN 8888 Linearizer Operators  Service Manual 277104 Rev B
Leeds Northrup LN 8888 Linearizer Operators Service Manual 277104 Rev B
$25.00
quality
LEEDS  NORTHRUP 10 OHMS ABS RESISTOR LN21
LEEDS NORTHRUP 10 OHMS ABS RESISTOR LN21
$120.00
quality
LEEDS  NORTHRUP LN 620006 SPEEDOMAX H ROUND CHART PAPER UNIVERSAL PLAIN SCALE
LEEDS NORTHRUP LN 620006 SPEEDOMAX H ROUND CHART PAPER UNIVERSAL PLAIN SCALE
$23.99
quality
LEEDS  NORTHRUP LN 620153 SPEEDOMAX H ROUND CHART PAPER DECIBEL SCALE
LEEDS NORTHRUP LN 620153 SPEEDOMAX H ROUND CHART PAPER DECIBEL SCALE
$24.99
quality
Leeds and Northrup Wheatstone Bridge 5430 AM 1
Leeds and Northrup Wheatstone Bridge 5430 AM 1
$57.85
quality
Vintage Leeds  Northrup Student Kelvin Bridge Untested
Vintage Leeds Northrup Student Kelvin Bridge Untested
$63.99
quality
18 pc Leeds Northrup Speedomax G H W Recorders Manuals Parts Supplies Schematics
18 pc Leeds Northrup Speedomax G H W Recorders Manuals Parts Supplies Schematics
$10.00
quality
New Leeds  Northrup Pressure Transmitter Model 2610 2610 102 11 2 00 0000 NIB
New Leeds Northrup Pressure Transmitter Model 2610 2610 102 11 2 00 0000 NIB
$999.99
quality
Leeds  Northrup Speedomax 250 Chart Recorder 255 11 000 000 41 0502 09 120V
Leeds Northrup Speedomax 250 Chart Recorder 255 11 000 000 41 0502 09 120V
$250.00
quality
LEEDS  NORTHRUP LN CIRCUIT BOARD 074867
LEEDS NORTHRUP LN CIRCUIT BOARD 074867
$65.00
quality
Leeds  Northrup Co Student Potentiometer Vintage Lab Instrument
Leeds Northrup Co Student Potentiometer Vintage Lab Instrument
$25.00
quality
Vintage Leeds  Northrup LN Potentiometer in Wood Case
Vintage Leeds Northrup LN Potentiometer in Wood Case
$189.95
quality
Leeds  Northrup Instruments Transmitter 2630 105 11 0 01 809 263010511001809
Leeds Northrup Instruments Transmitter 2630 105 11 0 01 809 263010511001809
$275.00
quality
Leeds  Northrup 080614 Feedback Element
Leeds Northrup 080614 Feedback Element
$16.00
quality
Leeds  Northrup Model 8692 Type K Temperature Potentiometer
Leeds Northrup Model 8692 Type K Temperature Potentiometer
$100.00
quality
Leeds  Northrup Co Volt Box Attenuator Cat 7592
Leeds Northrup Co Volt Box Attenuator Cat 7592
$11.50
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 4306 KELVIN BRIDGE
LEEDS NORTHRUP 4306 KELVIN BRIDGE
$125.00
quality
VINTAGE LEEDS AND NORTHRUP 7417 PH SPECIFIC MV METER
VINTAGE LEEDS AND NORTHRUP 7417 PH SPECIFIC MV METER
$5.99
quality
Leeds and Northrup Machine Rare Vintage 1175203
Leeds and Northrup Machine Rare Vintage 1175203
$129.95
quality
Vintage Leeds and Northrup Industrial Potentiometer 547336 DPC INV No 34 249 1
Vintage Leeds and Northrup Industrial Potentiometer 547336 DPC INV No 34 249 1
$19.50
quality
VINTAGE LEEDS  NORTHRUP PYROMETER 2201 RARE STEAMPUNK FROM POTENTIOMETER 8662
VINTAGE LEEDS NORTHRUP PYROMETER 2201 RARE STEAMPUNK FROM POTENTIOMETER 8662
$19.99
quality
Vintage Leeds  Northrup Optical element Galvanometer
Vintage Leeds Northrup Optical element Galvanometer
$18.95
quality
LEEDS  NORTHRUP 22850 GALVANOMETER
LEEDS NORTHRUP 22850 GALVANOMETER
$64.00
quality
Leeds and Northrup 8694 2 Temperature Potentiometer
Leeds and Northrup 8694 2 Temperature Potentiometer
$30.00
quality
Leeds  Northrup Resistor Calibrator Cat No 4776
Leeds Northrup Resistor Calibrator Cat No 4776
$19.99
quality
Vintage Leeds  Northrup Cable Spool I C Duplex Wire 1952 1950s Asb  Glass 20
Vintage Leeds Northrup Cable Spool I C Duplex Wire 1952 1950s Asb Glass 20
$49.99
quality
Vintage Leeds  Northrup Potentiometer 1555908
Vintage Leeds Northrup Potentiometer 1555908
$450.00
quality
GENREAL RADIO GR LEEDS AND NORTHRUP AUDIO OSCILLATOR 813 A MICROPHONE HUMMER
GENREAL RADIO GR LEEDS AND NORTHRUP AUDIO OSCILLATOR 813 A MICROPHONE HUMMER
$39.95
quality
Leeds  Northrup Speedomax Chart Recorder X L 680 681 69 000 0000 6 MLTVX
Leeds Northrup Speedomax Chart Recorder X L 680 681 69 000 0000 6 MLTVX
$100.00
quality
Vintage Leeds  Northrup Co Potentiometer Test Equipment
Vintage Leeds Northrup Co Potentiometer Test Equipment
$225.00
quality
LEEDS NORTHRUP METER UNKNOWN CONDITION OR MODEL
LEEDS NORTHRUP METER UNKNOWN CONDITION OR MODEL
$45.00
quality
LEEDS  NORTHRUP 965807 3 ROTARY SWITCH 031262 NIB
LEEDS NORTHRUP 965807 3 ROTARY SWITCH 031262 NIB
$51.96
quality
LEEDS  NORTHRUP 965807 3 ROTARY SWITCH 031262 NNB
LEEDS NORTHRUP 965807 3 ROTARY SWITCH 031262 NNB
$45.96
quality
NEW LEEDS NORTHRUP STD3338 5 354037 SPDT SYNCHRONOUS CONVERTER 19V AC D531771
NEW LEEDS NORTHRUP STD3338 5 354037 SPDT SYNCHRONOUS CONVERTER 19V AC D531771
$35.13
quality
Vintage Leeds  Northrup Co Potentiometer 493180 Parts Repair Wood Case
Vintage Leeds Northrup Co Potentiometer 493180 Parts Repair Wood Case
$19.99
quality
Vintage Leeds Northrup Co Potentiometer Mueller Bridge G 2 740545 1948 Wood Case
Vintage Leeds Northrup Co Potentiometer Mueller Bridge G 2 740545 1948 Wood Case
$36.00
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER LN8
LEEDS NORTHRUP LN DIGITAL CHART RECORDER LN8
$80.00
quality
Leeds  Northrup 2610 Differential Transmitter 2610 103 12 2 00 400 302 809
Leeds Northrup 2610 Differential Transmitter 2610 103 12 2 00 400 302 809
$250.00
quality
Vintage Leeds  Northrup Temperature Potentiometer  8694
Vintage Leeds Northrup Temperature Potentiometer 8694
$18.75
quality
NEW LEEDS  NORTHRUP PRESSURE TRANSMITTER 2610 100 11 2 00 206
NEW LEEDS NORTHRUP PRESSURE TRANSMITTER 2610 100 11 2 00 206
$174.99
quality
LEEDS NORTHRUP MULTIPLE RANGE POTENTIOMETER INDICATOR QUANTITY 2
LEEDS NORTHRUP MULTIPLE RANGE POTENTIOMETER INDICATOR QUANTITY 2
$149.99
quality
LEEDS  NORTHRUP PRESSURE TRANSMITTER MODEL 2610 100 11 2 01 206
LEEDS NORTHRUP PRESSURE TRANSMITTER MODEL 2610 100 11 2 01 206
$149.99
quality
MZ 45 LEEDS NORTHRUP CO 8695 2 TEMPERATURE POTENTIOMETER
MZ 45 LEEDS NORTHRUP CO 8695 2 TEMPERATURE POTENTIOMETER
$99.00
quality
LEEDS NORTHRUP AC DC DECADE RESISTOR CAT NO 4755
LEEDS NORTHRUP AC DC DECADE RESISTOR CAT NO 4755
$60.00
quality
Leeds  Northrup LN 7075 3 7075 4 101316 Directions 177730 Rev E 3309A 2
Leeds Northrup LN 7075 3 7075 4 101316 Directions 177730 Rev E 3309A 2
$25.00
quality
LN Leeds  Northrup 7073 17 Monitor Directions 177780 Rev G 3309a2
LN Leeds Northrup 7073 17 Monitor Directions 177780 Rev G 3309a2
$25.00
quality
LEEDS  NORTHRUP LN 9828 NULL DETECTOR GUARDED POTENTIOMETER 7556 bb
LEEDS NORTHRUP LN 9828 NULL DETECTOR GUARDED POTENTIOMETER 7556 bb
$400.00
quality
Leeds  Northrup LN 8693 2 Temperature Potentiometer Directions 177567 Rev B
Leeds Northrup LN 8693 2 Temperature Potentiometer Directions 177567 Rev B
$25.00
quality
VINTAGE Leeds and Northrup Model 8693 2 Temperature Potentiometer
VINTAGE Leeds and Northrup Model 8693 2 Temperature Potentiometer
$129.99
quality
Leeds  Northrup 7559 Low Range Potentiometer
Leeds Northrup 7559 Low Range Potentiometer
$150.00
quality
LEEDS  NORTHRUP 10 OHM STANDARD RESISTOR TESTED  WORKING
LEEDS NORTHRUP 10 OHM STANDARD RESISTOR TESTED WORKING
$39.99
quality
LEEDS NORTHRUP 9912 RUN UP BOX METER RESISTANCE ELECTRICAL TEST SET NAVY USED
LEEDS NORTHRUP 9912 RUN UP BOX METER RESISTANCE ELECTRICAL TEST SET NAVY USED
$40.61
quality
LN Leeds  Northrup R 820 15 Amplifier Testing  Service Directions 77 28 0 16
LN Leeds Northrup R 820 15 Amplifier Testing Service Directions 77 28 0 16
$25.00
quality
VINTAGE LEEDS  NORTHRUP MUELLER TEMPERATURE BRIDGE
VINTAGE LEEDS NORTHRUP MUELLER TEMPERATURE BRIDGE
$295.00
quality
VINTAGE LEEDS  NORTHRUP MUELLER TEMPERATURE BRIDGE
VINTAGE LEEDS NORTHRUP MUELLER TEMPERATURE BRIDGE
$295.00
quality
LEEDS AND NORTHRUP CO 8067 MUELLER TEMPERATURE BRIDGE
LEEDS AND NORTHRUP CO 8067 MUELLER TEMPERATURE BRIDGE
$225.00
quality
LN Leeds  Northrup 4025 B S Standard Resistor
LN Leeds Northrup 4025 B S Standard Resistor
$50.00
quality
LN LEEDS NORTHRUP 4210 THOMAS TYPE ONE OHM STANDARD WOOD BOX CASE ONLY
LN LEEDS NORTHRUP 4210 THOMAS TYPE ONE OHM STANDARD WOOD BOX CASE ONLY
$32.00
quality
Vintage Leeds  Northrup Cat No 4760 Wheatstone Bridge 218 16 5
Vintage Leeds Northrup Cat No 4760 Wheatstone Bridge 218 16 5
$34.99
quality
LEEDS NORTHRUP LN MODEL 8690 MILLIVOLT POTENTIOMETER GALVANOMETER
LEEDS NORTHRUP LN MODEL 8690 MILLIVOLT POTENTIOMETER GALVANOMETER
$52.00
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
LEEDS  NORTHRUP 10000 OHM STANDARD RESISTOR NIST calibration available
LEEDS NORTHRUP 10000 OHM STANDARD RESISTOR NIST calibration available
$90.00
quality
Leeds  Northrup 2430 E light beam Galvanometerworking light
Leeds Northrup 2430 E light beam Galvanometerworking light
$225.00
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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