Leeds Northrup

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Leeds and Northrup chart paper 690112
Leeds and Northrup chart paper 690112
$5.00
quality
Leeds  Northrup 185233 Galvanometer
Leeds Northrup 185233 Galvanometer
$20.00
quality
Vintage Leeds  Northrup Co Potentiometer Test Equipment Voltage Galvanometer
Vintage Leeds Northrup Co Potentiometer Test Equipment Voltage Galvanometer
$125.00
quality
Leeds  Northrup Portable Precision Potentiometer w Directions  Note Book
Leeds Northrup Portable Precision Potentiometer w Directions Note Book
$125.00
quality
Leeds  Northrup LN 10760 Series Control Units Parts Catalog
Leeds Northrup LN 10760 Series Control Units Parts Catalog
$6.40
quality
Leeds  Northrup LN Series 38 Pneumatic Control Parts Catalog
Leeds Northrup LN Series 38 Pneumatic Control Parts Catalog
$6.40
quality
Leeds  Northrup LN 4905 Series Conductivity Cells Directions
Leeds Northrup LN 4905 Series Conductivity Cells Directions
$7.20
quality
Leeds  Northrup LN Series 80 3 Action DAT Controller Directions
Leeds Northrup LN Series 80 3 Action DAT Controller Directions
$9.60
quality
Leeds  Northrup LN Speedomax G H W 6430 6460 Series 80 60 Directions  MORE
Leeds Northrup LN Speedomax G H W 6430 6460 Series 80 60 Directions MORE
$28.00
quality
LEEDS  NORTHRUP POTENTIOMETER IN WOODEN BOX 729438
LEEDS NORTHRUP POTENTIOMETER IN WOODEN BOX 729438
$49.99
quality
LEEDS  NORTHRUP POTENTIOMETER IN WOODEN BOX 736283
LEEDS NORTHRUP POTENTIOMETER IN WOODEN BOX 736283
$49.99
quality
VINTAGE LEEDS  NORTHRUP K 2 POTENTIOMETER IN WOODEN BOX 792084
VINTAGE LEEDS NORTHRUP K 2 POTENTIOMETER IN WOODEN BOX 792084
$49.99
quality
LEEDS  NORTHRUP DEFLECTION POTENTIOMETER MODEL 7 w WESTON 440 GALVANOMETER
LEEDS NORTHRUP DEFLECTION POTENTIOMETER MODEL 7 w WESTON 440 GALVANOMETER
$199.99
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 Differential Pressure Flow Transmitter 1912 2 20 0 0000 120v
Leeds Northrup Differential Pressure Flow Transmitter 1912 2 20 0 0000 120v
$160.00
quality
LEEDS AND NORTHRUP SERIES 165 250 SPEEDOMAX RECORDER
LEEDS AND NORTHRUP SERIES 165 250 SPEEDOMAX RECORDER
$1,099.99
quality
Leeds  Northrup Speedomax W Chart Paper NEW
Leeds Northrup Speedomax W Chart Paper NEW
$2.76
quality
Vintage Leeds  Northrup Catalog No 2400B Micro Ampere Deflection Meter
Vintage Leeds Northrup Catalog No 2400B Micro Ampere Deflection Meter
$149.00
quality
LEEDS NORTHRUP SPEEDOMAX CHART RECORDER
LEEDS NORTHRUP SPEEDOMAX CHART RECORDER
$39.99
quality
LEEDS  NORTHRUP MANUAL SCANNER UNIT 8239
LEEDS NORTHRUP MANUAL SCANNER UNIT 8239
$159.95
quality
Leeds  Northrup 1930s Model 5430 A Electrical Test Set in Wood Box WORKING
Leeds Northrup 1930s Model 5430 A Electrical Test Set in Wood Box WORKING
$89.99
quality
2LEEDS NORTHRUP SHUNT BOX 4385 AND VOLT BOX 7598 750 OHMS VOLTS
2LEEDS NORTHRUP SHUNT BOX 4385 AND VOLT BOX 7598 750 OHMS VOLTS
$60.00
quality
LEEDS NORTHRUP AYRTON SHUNT 2666
LEEDS NORTHRUP AYRTON SHUNT 2666
$40.00
quality
2LEEDS NORTHRUP AYRTON SHUNT 2666 AND 2665
2LEEDS NORTHRUP AYRTON SHUNT 2666 AND 2665
$60.00
quality
Vintage Leeds  Northrup No 4282 OHMMETER GALVONOMETER Excellent condition
Vintage Leeds Northrup No 4282 OHMMETER GALVONOMETER Excellent condition
$75.00
quality
LEEDS  NORTHRUP TESTING SET NO 5300
LEEDS NORTHRUP TESTING SET NO 5300
$29.99
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER in BOX LCH1
LEEDS NORTHRUP LN DIGITAL CHART RECORDER in BOX LCH1
$150.00
quality
LEEDS  NORTHRUP LN DIGITAL CHART RECORDER in BOX LCH2
LEEDS NORTHRUP LN DIGITAL CHART RECORDER in BOX LCH2
$100.00
quality
LEEDS  NORTHRUP instruments CONTROLLER general signal
LEEDS NORTHRUP instruments CONTROLLER general signal
$333.00
quality
Leeds  Northrup Co 682216 Potentiometer Vintage Lab Tool Wooden Box Quality
Leeds Northrup Co 682216 Potentiometer Vintage Lab Tool Wooden Box Quality
$199.95
quality
Leeds  Northrup Galvanometer
Leeds Northrup Galvanometer
$9.99
quality
Leeds  Northrup 4394 Precision Four Dial Kelvin Wheatstone Ratio Set Manual
Leeds Northrup 4394 Precision Four Dial Kelvin Wheatstone Ratio Set Manual
$20.00
quality
Leeds  Northrup 4385 Shunt Box Operating Manual w schematicIssue 3
Leeds Northrup 4385 Shunt Box Operating Manual w schematicIssue 3
$18.75
quality
Leeds  Northrup 4306 Kelvin Bridge Operating Manual Issue 2
Leeds Northrup 4306 Kelvin Bridge Operating Manual Issue 2
$16.00
quality
Leeds  Northrup 4287 Precision D C Kelvin Bridge Parts List1966
Leeds Northrup 4287 Precision D C Kelvin Bridge Parts List1966
$12.00
quality
Leeds  Northrup Pressure Transmitter
Leeds Northrup Pressure Transmitter
$150.62
quality
Leeds  Northrup 2437 DC Null Detector Operating Manual w schematic
Leeds Northrup 2437 DC Null Detector Operating Manual w schematic
$20.00
quality
Vintage Leeds and Northrup KELVIN BRIDGE OHMMETER Model 4285 in Wood Case USA
Vintage Leeds and Northrup KELVIN BRIDGE OHMMETER Model 4285 in Wood Case USA
$89.95
quality
LEEDS  NORTHRUP 7075 1 018 120 001 000 SPECIFIC RESISTANCE 120 240 VAC
LEEDS NORTHRUP 7075 1 018 120 001 000 SPECIFIC RESISTANCE 120 240 VAC
$139.99
quality
Leeds and Northrup Universal Ratio Set Cat 4393 w Lid
Leeds and Northrup Universal Ratio Set Cat 4393 w Lid
$224.99
quality
Leeds  Northrup 2284 abc and d Galvanometers Directions Manual
Leeds Northrup 2284 abc and d Galvanometers Directions Manual
$20.00
quality
Leeds  Northrup 923 Numatron Digital Indicator Directions Manual w schematics
Leeds Northrup 923 Numatron Digital Indicator Directions Manual w schematics
$20.00
quality
Leeds  Northrup 80 Series3 Action PAT Controller Instruction Manual w sch
Leeds Northrup 80 Series3 Action PAT Controller Instruction Manual w sch
$20.00
quality
Leeds  Northrup 60 Series Control Using Three Action PAT Control Unit Manual
Leeds Northrup 60 Series Control Using Three Action PAT Control Unit Manual
$20.00
quality
LEEDS  NORTHRUP 9912 RUN UP BOX
LEEDS NORTHRUP 9912 RUN UP BOX
$52.50
quality
Leeds  Northrup Millivolt Potentiometers 8691 2 With Manual Built in Carry Box
Leeds Northrup Millivolt Potentiometers 8691 2 With Manual Built in Carry Box
$64.95
quality
Leeds  Northrup 660912 Speedomax H Chart Paper
Leeds Northrup 660912 Speedomax H Chart Paper
$13.95
quality
VINTAGE LEEDS  NORTHRUP 9838 GUARDED NANOVOLT DETECTOR
VINTAGE LEEDS NORTHRUP 9838 GUARDED NANOVOLT DETECTOR
$60.00
quality
VINTAGE LEEDS  NORTHRUP 8690 2 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8690 2 MALLIVOLT POTENTIOMETER
$60.00
quality
LEEDS  NORTHRUP 4395 100000  VOLTAGE DIVIDER
LEEDS NORTHRUP 4395 100000 VOLTAGE DIVIDER
$175.00
quality
VINTAGE LEEDS  NORTHRUP 8691 2 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8691 2 MALLIVOLT POTENTIOMETER
$60.00
quality
VINTAGE LEEDS  NORTHRUP 8696 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8696 MALLIVOLT POTENTIOMETER
$50.00
quality
VINTAGE LEEDS  NORTHRUP 8690 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8690 MALLIVOLT POTENTIOMETER
$50.00
quality
Lot of 4 Rolls of LEEDS  NORTHRUP SPEEDOMAX G CHART PAPER 100 LINE  690425
Lot of 4 Rolls of LEEDS NORTHRUP SPEEDOMAX G CHART PAPER 100 LINE 690425
$47.99
quality
Leeds  Northrup 075706
Leeds Northrup 075706
$399.99
quality
Leeds  Northrup Speedomax XL Recorder 600 Series Direction Operating Manual
Leeds Northrup Speedomax XL Recorder 600 Series Direction Operating Manual
$52.50
quality
Leeds  Northrup Speedomax W L for OneTwo Pen Recorders Operating Manual
Leeds Northrup Speedomax W L for OneTwo Pen Recorders Operating Manual
$26.25
quality
Leeds  Northrup Speedomax W Parts Catalog 179018
Leeds Northrup Speedomax W Parts Catalog 179018
$30.00
quality
Leeds  Northrup Speedomax W with Series 80 Controller Operating Manual
Leeds Northrup Speedomax W with Series 80 Controller Operating Manual
$30.00
quality
Leeds  Northrup Speedomax W with Series 60 Controller Operating Manual
Leeds Northrup Speedomax W with Series 60 Controller Operating Manual
$30.00
quality
LEEDS AND NORTHRUP PRESSURE TRANSMITTER MODEL 2610
LEEDS AND NORTHRUP PRESSURE TRANSMITTER MODEL 2610
$125.00
quality
LEEDS  NORTHRUP 070239 METER NIB
LEEDS NORTHRUP 070239 METER NIB
$56.50
quality
Leeds  Northrup 8690 2 Millivolt Potentiometer Direction Operating Manual
Leeds Northrup 8690 2 Millivolt Potentiometer Direction Operating Manual
$20.00
quality
Leeds  Northrup 8690 Millivolt Potentionmeter Directions Operating Manual
Leeds Northrup 8690 Millivolt Potentionmeter Directions Operating Manual
$20.00
quality
Leeds  Northrup 8667 Potentiometer Directions Operating Manual
Leeds Northrup 8667 Potentiometer Directions Operating Manual
$20.00
quality
Leeds  Northrup 8662 Portable Precision Potentiometer Direction Operating Book
Leeds Northrup 8662 Portable Precision Potentiometer Direction Operating Book
$20.00
quality
Leeds  Northrup Standard Resistor 10 Ohms
Leeds Northrup Standard Resistor 10 Ohms
$69.99
quality
Leeds  Northrup 8411 Fixed Temperature Standard Direction Operating Manual
Leeds Northrup 8411 Fixed Temperature Standard Direction Operating Manual
$20.00
quality
Leeds  Northrup 8401 Constant Temperature Oil Bath Assembly Operating Manual
Leeds Northrup 8401 Constant Temperature Oil Bath Assembly Operating Manual
$16.00
quality
Leeds  Northrup 8248 8249 Rotary Selector Switches Operating Manual
Leeds Northrup 8248 8249 Rotary Selector Switches Operating Manual
$20.00
quality
Leeds  Northrup 8072 Type G 4 Mueller Bridge Operating Manual w diagrams
Leeds Northrup 8072 Type G 4 Mueller Bridge Operating Manual w diagrams
$16.00
quality
Leeds  Northrup 8069 B Mueller Temperature Bridge Operating Manual w diagrams
Leeds Northrup 8069 B Mueller Temperature Bridge Operating Manual w diagrams
$20.00
quality
LEEDS  NORTHRUP OUTPUT BOARD ASSEMBLY 046313 NEW OUT OF BOX
LEEDS NORTHRUP OUTPUT BOARD ASSEMBLY 046313 NEW OUT OF BOX
$245.00
quality
CIRCA 1920S LEEDS AND NORTHRUP WOOD BASE POTENTIOMETER S45431 TYPE K
CIRCA 1920S LEEDS AND NORTHRUP WOOD BASE POTENTIOMETER S45431 TYPE K
$39.99
quality
LEEDS  NORTHRUP SPEEDOMAX W CHART PAPER NO 490912T 1
LEEDS NORTHRUP SPEEDOMAX W CHART PAPER NO 490912T 1
$10.00
quality
Directions for STRIP CHART RECORDERS with MICROMAX MECHANISM Leeds Northrup
Directions for STRIP CHART RECORDERS with MICROMAX MECHANISM Leeds Northrup
$4.97
quality
LEEDS  NORTHRUP RUN UP BOX 9912
LEEDS NORTHRUP RUN UP BOX 9912
$49.99
quality
LEEDS  NORTHRUP THOMAS TYPE 1 OHM STANDARD 4210 NICE
LEEDS NORTHRUP THOMAS TYPE 1 OHM STANDARD 4210 NICE
$1,250.00
quality
Leeds  Northrup Zero Voltage Power Pack
Leeds Northrup Zero Voltage Power Pack
$13.39
quality
Leeds  Northrup 4775 Calibrator Tester Quality Vintage Laboratory Equipment
Leeds Northrup 4775 Calibrator Tester Quality Vintage Laboratory Equipment
$49.99
quality
LEEDS  NORTHRUP 4905 01 33 091 7 000 CONDUCTIVITY CELL NEW NO BOX B13
LEEDS NORTHRUP 4905 01 33 091 7 000 CONDUCTIVITY CELL NEW NO BOX B13
$49.95
quality
Vintage Leeds  Northrup 2239E Galvanometer 1920 era With iron stand 69
Vintage Leeds Northrup 2239E Galvanometer 1920 era With iron stand 69
$62.10
quality
Test Set Leeds  Northrup No 5305 CTAM 9255
Test Set Leeds Northrup No 5305 CTAM 9255
$65.00
quality
LEEDS NORTHRUP 8690 2 MILLIVOLT POTENTIOMETER D525668
LEEDS NORTHRUP 8690 2 MILLIVOLT POTENTIOMETER D525668
$35.00
quality
LEEDS  NORTHRUP HISTORIC Vintage LAB VOLTAGE Potentiometer 1074150 Ford motor
LEEDS NORTHRUP HISTORIC Vintage LAB VOLTAGE Potentiometer 1074150 Ford motor
$500.00
quality
NEW Leeds  Northrup 031308 20 Point Resistor FREE SHIPPING
NEW Leeds Northrup 031308 20 Point Resistor FREE SHIPPING
$27.99
quality
LEEDS NORTHRUP 7079 17 01 300 024 000 CONDUCTIVITY TRANSMITTER D513737
LEEDS NORTHRUP 7079 17 01 300 024 000 CONDUCTIVITY TRANSMITTER D513737
$35.53
quality
LEEDS  NORTHRUP SPEEDOMAX CHART RECORDER
LEEDS NORTHRUP SPEEDOMAX CHART RECORDER
$349.99
quality
LEEDS  NORTHRUP 8070 RESISTOR
LEEDS NORTHRUP 8070 RESISTOR
$175.00
quality
Vintage Leeds  Northrup 2430 D Reflecting Galvanometer Type E Light Beam
Vintage Leeds Northrup 2430 D Reflecting Galvanometer Type E Light Beam
$99.95
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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