Leeds Northrup

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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 RAYTUBE TEMP DETECTOR 240MV  3000 F
LEEDS NORTHRUP RAYTUBE TEMP DETECTOR 240MV 3000 F
$25.00
quality
Leeds  Northrup MICROMAX CHART RECORDER
Leeds Northrup MICROMAX CHART RECORDER
$750.00
quality
Leeds and Northrup Students Potentiometer 7645 USA
Leeds and Northrup Students Potentiometer 7645 USA
$10.00
quality
LEEDS  NORTHRUP 7556 AND 7556 1 GUARDED SIX DIAL POTENTIOMETERS DIRECTIONS
LEEDS NORTHRUP 7556 AND 7556 1 GUARDED SIX DIAL POTENTIOMETERS DIRECTIONS
$24.97
quality
LEEDS  NORTHRUP 7553 TYPE K3 UNIVERSAL GUARDED POTENTIOMETER DIRECTIONS
LEEDS NORTHRUP 7553 TYPE K3 UNIVERSAL GUARDED POTENTIOMETER DIRECTIONS
$21.97
quality
LEEDS  NORTHRUP 7553 5 AND 7553 6 TYPE K 3 UNIVERSAL POTENTIOMETERS DIRECTIONS
LEEDS NORTHRUP 7553 5 AND 7553 6 TYPE K 3 UNIVERSAL POTENTIOMETERS DIRECTIONS
$18.97
quality
Leeds  Northrup 01055979 Printer Red Marker 15 pcs
Leeds Northrup 01055979 Printer Red Marker 15 pcs
$59.99
quality
Lowered Price LN Leeds  Northrup 4222 001 Ohm Standard Resistor
Lowered Price LN Leeds Northrup 4222 001 Ohm Standard Resistor
$395.00
quality
Vintage Leeds  Northrup 638097 Potentiometer  Galvanometer Test Equipment
Vintage Leeds Northrup 638097 Potentiometer Galvanometer Test Equipment
$79.00
quality
LEEDS  NORTHRUP Resistance Decacde 4776 Resistor Box 160699
LEEDS NORTHRUP Resistance Decacde 4776 Resistor Box 160699
$199.00
quality
Leeds Northrup 10548213 Green Markers Lot of 30
Leeds Northrup 10548213 Green Markers Lot of 30
$25.00
quality
Leeds  Northrup 8064 8064 A Resistance Thermometer Bridge Direction Op Manual
Leeds Northrup 8064 8064 A Resistance Thermometer Bridge Direction Op Manual
$13.30
quality
Leeds  Northrup 8686 Millivolt Potentiometer
Leeds Northrup 8686 Millivolt Potentiometer
$60.00
quality
Leeds Northrup 10548189 Blue Markers Lot of 30
Leeds Northrup 10548189 Blue Markers Lot of 30
$25.00
quality
LEEDS NORTHRUP AYRTON SHUNT Cat 2666 Total Resistance 10 000OHMS
LEEDS NORTHRUP AYRTON SHUNT Cat 2666 Total Resistance 10 000OHMS
$49.99
quality
LEEDS  NORTHRUP INSTRUMENTS CONDUCTIVITY METER 120VAC FOR PARTS OR REPAIR
LEEDS NORTHRUP INSTRUMENTS CONDUCTIVITY METER 120VAC FOR PARTS OR REPAIR
$30.00
quality
GENTLY USED LEEDS  NORTHRUP 10 Ohm RESISTANCE STANDARD 1578936 TESTED
GENTLY USED LEEDS NORTHRUP 10 Ohm RESISTANCE STANDARD 1578936 TESTED
$395.00
quality
USED LEEDS  NORTHRUP 10000 Ohm RESISTANCE STANDARD 10KOhm1566917 TESTED
USED LEEDS NORTHRUP 10000 Ohm RESISTANCE STANDARD 10KOhm1566917 TESTED
$425.00
quality
Vintage Leeds Northrup 132980 Voltage Wood Box Tester Machine Galvanometer Test
Vintage Leeds Northrup 132980 Voltage Wood Box Tester Machine Galvanometer Test
$44.99
quality
LEEDS  NORTHRUP TRANSFORMER TESTING SET 190372 LN TEST KIT
LEEDS NORTHRUP TRANSFORMER TESTING SET 190372 LN TEST KIT
$59.99
quality
Vintage Leeds And Northrup Western Electric Null Voltage Test Set
Vintage Leeds And Northrup Western Electric Null Voltage Test Set
$80.00
quality
LEEDS  NORTHRUP SERIES 60 CONTROL 354163
LEEDS NORTHRUP SERIES 60 CONTROL 354163
$95.00
quality
LEEDS  NORTHRUP 4221 1 OHM STANDARD RESISTOR
LEEDS NORTHRUP 4221 1 OHM STANDARD RESISTOR
$349.98
quality
8693 LEEDS  NORTHRUP TEMPERATURE POTENTIOMETER
8693 LEEDS NORTHRUP TEMPERATURE POTENTIOMETER
$39.00
quality
8693 LEEDS  NORTHRUP TEMPERATURE POTENTIOMETER
8693 LEEDS NORTHRUP TEMPERATURE POTENTIOMETER
$29.00
quality
Vintage Leeds  Northrup Co PHILADELPHIA TEST EQUIPMENT 173238 IN MAHOGANY CASE
Vintage Leeds Northrup Co PHILADELPHIA TEST EQUIPMENT 173238 IN MAHOGANY CASE
$149.00
quality
LEEDS NORTHRUP 3 ACTION SERIES 80 CAT CONTROLLER D553917
LEEDS NORTHRUP 3 ACTION SERIES 80 CAT CONTROLLER D553917
$67.33
quality
Vintage Leeds  Northrup Microfarad Capacitor Model 1056
Vintage Leeds Northrup Microfarad Capacitor Model 1056
$49.99
quality
Vintage Leeds  Northrup Cat 4755 AC DC Decade Resistor USED FREE SHIPPING
Vintage Leeds Northrup Cat 4755 AC DC Decade Resistor USED FREE SHIPPING
$59.99
quality
LEEDS  NORTHRUP HISTORIC Vintage LAB VOLTAGE Potentiometer 1074150 Ford Motor
LEEDS NORTHRUP HISTORIC Vintage LAB VOLTAGE Potentiometer 1074150 Ford Motor
$250.00
quality
Leeds  Northrup 7555 7555 1  Type K 5 Potentiometer Calibration Procedure
Leeds Northrup 7555 7555 1 Type K 5 Potentiometer Calibration Procedure
$13.30
quality
Leeds  Northrup Company Calibrator Cat No 4776
Leeds Northrup Company Calibrator Cat No 4776
$55.17
quality
LEEDS  NORTHRUP SPEEDOMAX RECORDER 610002 TC TYPE K
LEEDS NORTHRUP SPEEDOMAX RECORDER 610002 TC TYPE K
$395.00
quality
Leeds and Northrup A19 030219 100460 CBR0215
Leeds and Northrup A19 030219 100460 CBR0215
$236.00
quality
Leeds Northrup Interface Board 205176
Leeds Northrup Interface Board 205176
$158.00
quality
TM 4200 LEEDS AND NORTHRUP CAT  2610 100 11 0 01 000 TRANSMITTER
TM 4200 LEEDS AND NORTHRUP CAT 2610 100 11 0 01 000 TRANSMITTER
$49.00
quality
Leeds Northrup PA Interface 205221
Leeds Northrup PA Interface 205221
$199.00
quality
LEEDS AND NORTHRUP 8690 2 MILLIVOLT POTENTIOMETER Perfect condition
LEEDS AND NORTHRUP 8690 2 MILLIVOLT POTENTIOMETER Perfect condition
$25.00
quality
Leeds Northrup PA Interface 205221
Leeds Northrup PA Interface 205221
$119.00
quality
Leeds Northrup Logic CD Board 201176
Leeds Northrup Logic CD Board 201176
$156.00
quality
Leeds Northrup Circuit Board 064556 9014008 A18
Leeds Northrup Circuit Board 064556 9014008 A18
$156.00
quality
LEEDS  NORTHRUP Resistance Standard 20741 ohm Low Thermal
LEEDS NORTHRUP Resistance Standard 20741 ohm Low Thermal
$69.99
quality
Leeds  Northrup Resistance Standard 111111 ohm Low Thermal
Leeds Northrup Resistance Standard 111111 ohm Low Thermal
$114.99
quality
Leeds  Northrup Processor Data PC Board A18 054906
Leeds Northrup Processor Data PC Board A18 054906
$152.00
quality
Leeds Northrup Mini Station Board A9 030289
Leeds Northrup Mini Station Board A9 030289
$236.00
quality
Leeds Northrup Adjusting Current Board A3 054907
Leeds Northrup Adjusting Current Board A3 054907
$236.00
quality
Leeds Northrup Millivolt Potentiometer Cat No 8686 Vintage Test Equipment GS
Leeds Northrup Millivolt Potentiometer Cat No 8686 Vintage Test Equipment GS
$44.99
quality
Leeds  Northrup Temperature Potientiometer 8693 2 Vintage
Leeds Northrup Temperature Potientiometer 8693 2 Vintage
$194.99
quality
Leeds  Northrup 4025B 10ohm Leeds  Northrup Resistor 10 Ohm
Leeds Northrup 4025B 10ohm Leeds Northrup Resistor 10 Ohm
$250.00
quality
SPEEDOMAX 1650 2500  2500RTD MULTIPOINT RECORDERS LEEDS  NORTHRUP
SPEEDOMAX 1650 2500 2500RTD MULTIPOINT RECORDERS LEEDS NORTHRUP
$999.00
quality
LEEDS NORTHRUP CONTROLLER 601 3 04 1 0 00 00 00 USED
LEEDS NORTHRUP CONTROLLER 601 3 04 1 0 00 00 00 USED
$150.00
quality
Vintage Leeds  Northrup 8686 Millivolt Potentiometer with manual
Vintage Leeds Northrup 8686 Millivolt Potentiometer with manual
$39.95
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 RESISTANCE BRIDGE 4764
VINTAGE LEEDS NORTHRUP RESISTANCE BRIDGE 4764
$125.00
quality
VINTAGE LEEDS  NORTHRUP 8690 2 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8690 2 MALLIVOLT POTENTIOMETER
$40.00
quality
LEEDS  NORTHRUP Model 7554 TYPE K 4 POTENTIOMETER
LEEDS NORTHRUP Model 7554 TYPE K 4 POTENTIOMETER
$165.00
quality
VINTAGE LEEDS  NORTHRUP 9838 GUARDED NANOVOLT DETECTOR
VINTAGE LEEDS NORTHRUP 9838 GUARDED NANOVOLT DETECTOR
$50.00
quality
LEEDS NORTHRUP POTENTIOMETER TESTER IN WOODEN BOX
LEEDS NORTHRUP POTENTIOMETER TESTER IN WOODEN BOX
$50.00
quality
VINTAGE LEEDS  NORTHRUP 8691 2 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8691 2 MALLIVOLT POTENTIOMETER
$50.00
quality
LEEDS  NORTHRUP SILSBEE CURRENT TRANSFORMER TESTING SET 7150
LEEDS NORTHRUP SILSBEE CURRENT TRANSFORMER TESTING SET 7150
$225.00
quality
LEEDS NORTHRUP INDICATOR TESTER POTENTIOMETER IN WOODEN BOX
LEEDS NORTHRUP INDICATOR TESTER POTENTIOMETER IN WOODEN BOX
$60.00
quality
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
$40.00
quality
LEEDS  NORTHRUP Model 7555 TYPE K 5 POTENTIOMETER
LEEDS NORTHRUP Model 7555 TYPE K 5 POTENTIOMETER
$175.00
quality
VINTAGE LEEDS  NORTHRUP 8690 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8690 MALLIVOLT POTENTIOMETER
$40.00
quality
LEEDS  NORTHRUP 4395 100000  VOLTAGE DIVIDER
LEEDS NORTHRUP 4395 100000 VOLTAGE DIVIDER
$150.00
quality
LEEDS  NORTHRUP VOLT POTENTIOMETER 8687
LEEDS NORTHRUP VOLT POTENTIOMETER 8687
$65.00
quality
VINTAGE LEEDS  NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
VINTAGE LEEDS NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
$100.00
quality
LEEDS  NORTHRUP RESISTANCE THEMOMETER BRIDGE 8064 A
LEEDS NORTHRUP RESISTANCE THEMOMETER BRIDGE 8064 A
$95.00
quality
VINTAGE LEEDS  NORTHRUP 8686 S WITH FLUKE 840 A POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8686 S WITH FLUKE 840 A POTENTIOMETER
$125.00
quality
VINTAGE LEEDS  NORTHRUP 8696 MALLIVOLT POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8696 MALLIVOLT POTENTIOMETER
$40.00
quality
LEEDS  NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
LEEDS NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
$115.00
quality
LEEDS NORTHRUP CAT 4393 UNIVERSAL RATIO SET
LEEDS NORTHRUP CAT 4393 UNIVERSAL RATIO SET
$175.00
quality
LEEDS AND NORTHRUP CO 8067 MUELLER TEMPERATURE BRIDGE
LEEDS AND NORTHRUP CO 8067 MUELLER TEMPERATURE BRIDGE
$225.00
quality
LEEDS  NORTHRUP 7591 VOLT BOX POTENTIOMETER
LEEDS NORTHRUP 7591 VOLT BOX POTENTIOMETER
$115.00
quality
LEEDS  NORTHRUP 100000 OHM DC VOLTAGE DIVIDER
LEEDS NORTHRUP 100000 OHM DC VOLTAGE DIVIDER
$165.00
quality
VINTAGE LEEDS  NORTHRUP MUELLER TEMPERATURE BRIDGE
VINTAGE LEEDS NORTHRUP MUELLER TEMPERATURE BRIDGE
$265.00
quality
VINTAGE LEEDS  NORTHRUP MUELLER TEMPERATURE BRIDGE
VINTAGE LEEDS NORTHRUP MUELLER TEMPERATURE BRIDGE
$265.00
quality
LEEDS  NORTHRUP 063232 ANALOG MODULE CONTROL NEW NO BOX
LEEDS NORTHRUP 063232 ANALOG MODULE CONTROL NEW NO BOX
$407.00
quality
LEEDS  NORTHRUP MILLIVOLT POTENTIOMETER CAT NO 8686
LEEDS NORTHRUP MILLIVOLT POTENTIOMETER CAT NO 8686
$75.00
quality
Leeds  Northrup Speedomax W Chart Paper 490173
Leeds Northrup Speedomax W Chart Paper 490173
$4.50
quality
Vintage Leeds  Northrup Co LN Potentiometer Indicator Great UN Tested
Vintage Leeds Northrup Co LN Potentiometer Indicator Great UN Tested
$29.24
quality
VINTAGE Leeds Northrup Portable Bench Top Wood Resistor Potentiometer PARTS
VINTAGE Leeds Northrup Portable Bench Top Wood Resistor Potentiometer PARTS
$48.99
quality
ANTIQUE LEEDS  NORTHRUP OHMMETER GALVONOMETER No 4282 PHILADELPHIA PA
ANTIQUE LEEDS NORTHRUP OHMMETER GALVONOMETER No 4282 PHILADELPHIA PA
$79.99
quality
LEEDS  NORTHRUP LN MULTIPLE RANGE POTENTIOMETER INDICATOR
LEEDS NORTHRUP LN MULTIPLE RANGE POTENTIOMETER INDICATOR
$49.99
quality
LEEDS NORTHRUP 1026710250100101 CONTROLLER USED
LEEDS NORTHRUP 1026710250100101 CONTROLLER USED
$250.00
quality
LEEDS  NORTHRUP 179018 SPEEDOMAX W PARTS CATALOG VINTAGE 1979
LEEDS NORTHRUP 179018 SPEEDOMAX W PARTS CATALOG VINTAGE 1979
$14.00
quality
LEEDS  NORTHRUP SYNCHRONOUS CONVERTER 354233
LEEDS NORTHRUP SYNCHRONOUS CONVERTER 354233
$80.00
quality
LEEDS  NORTHRUP 7630 DEFLECTION POTENTIOMETER MODEL 7 MANUAL
LEEDS NORTHRUP 7630 DEFLECTION POTENTIOMETER MODEL 7 MANUAL
$14.00
quality
LEEDS  NORTHRUP 7625 BROOKS HARRIS POTENTIOMETER MANUAL SCHEMATICS
LEEDS NORTHRUP 7625 BROOKS HARRIS POTENTIOMETER MANUAL SCHEMATICS
$14.00
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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