Leeds Northrup

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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
VINTAGE LEEDS NORTHRUP CAPACITANCE BOX WOODEN CASE
VINTAGE LEEDS NORTHRUP CAPACITANCE BOX WOODEN CASE
$29.99
quality
VINTAGE LEEDS NORTHRUP DECADE VOLTAGE RESISTANCE BOX 01 to 100 WOODEN CASE
VINTAGE LEEDS NORTHRUP DECADE VOLTAGE RESISTANCE BOX 01 to 100 WOODEN CASE
$29.99
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
Leeds  Northrup 4775 Calibrator Tester Quality Vintage Laboratory Equipment
Leeds Northrup 4775 Calibrator Tester Quality Vintage Laboratory Equipment
$99.95
quality
VINTAGE LEEDS  NORTHRUP STUDENTS POTENTIOMETER MN 7645
VINTAGE LEEDS NORTHRUP STUDENTS POTENTIOMETER MN 7645
$50.24
quality
LEEDS NORTHRUP METER UNKNOWN CONDITION OR MODEL
LEEDS NORTHRUP METER UNKNOWN CONDITION OR MODEL
$45.00
quality
LEEDS NORTHRUP 078160 CIRCUIT BOARD LOGIC CARD NEW NOS 149
LEEDS NORTHRUP 078160 CIRCUIT BOARD LOGIC CARD NEW NOS 149
$134.10
quality
Leeds  Northrup Station Auto Manual
Leeds Northrup Station Auto Manual
$189.00
quality
Leeds  Northrup 4801 01 03 22 088 Conductivity Cell w Temp Compensator NEW
Leeds Northrup 4801 01 03 22 088 Conductivity Cell w Temp Compensator NEW
$395.00
quality
LEEDS  NORTHRUP RESISTORS 1 OHM A9
LEEDS NORTHRUP RESISTORS 1 OHM A9
$60.00
quality
LEEDS  NORTHRUP RESISTORS 1 OHM C7
LEEDS NORTHRUP RESISTORS 1 OHM C7
$60.00
quality
LEEDS  NORTHRUP RESISTORS 10 OHMS B8
LEEDS NORTHRUP RESISTORS 10 OHMS B8
$68.00
quality
LEEDS  NORTHRUP RESISTORS 1 OHM D6
LEEDS NORTHRUP RESISTORS 1 OHM D6
$60.00
quality
LEEDS  NORTHRUP RESISTORS 1 OHM E5
LEEDS NORTHRUP RESISTORS 1 OHM E5
$60.00
quality
LEEDS  NORTHRUP RESISTORS 1 OHM F4
LEEDS NORTHRUP RESISTORS 1 OHM F4
$60.00
quality
19 LEEDS  NORTHRUP SPEEDOMAX MINI RECORDER CHART PAPER
19 LEEDS NORTHRUP SPEEDOMAX MINI RECORDER CHART PAPER
$190.00
quality
Vtg Leeds  Northrup Temperature Potentiometer 8692 Electrical Test Equipment
Vtg Leeds Northrup Temperature Potentiometer 8692 Electrical Test Equipment
$68.99
quality
LEEDS AND NORTHRUP 8686 MILLIVOLT POTENTIOMETER MADE IN USA VINTAGE
LEEDS AND NORTHRUP 8686 MILLIVOLT POTENTIOMETER MADE IN USA VINTAGE
$39.95
quality
Leeds Northrup Millivolt potentiometer 1120272 Oak Case nice cond un tested
Leeds Northrup Millivolt potentiometer 1120272 Oak Case nice cond un tested
$40.00
quality
Leeds Northrup volt potentiometerCat  8687 nice cond un tested
Leeds Northrup volt potentiometerCat 8687 nice cond un tested
$40.00
quality
Leeds  Northrup speedomax 250 chart paper pack of 5
Leeds Northrup speedomax 250 chart paper pack of 5
$15.00
quality
LEEDS  NORTHRUP 7555 TYPE K 5 POTENTIOMETER
LEEDS NORTHRUP 7555 TYPE K 5 POTENTIOMETER
$193.50
quality
Leeds  Northrup Manual 4397 M Voltage Divider Resistive Instruction Manual
Leeds Northrup Manual 4397 M Voltage Divider Resistive Instruction Manual
$20.00
quality
Vintage Leeds  Northrup Potentiometer Indicator Tester Galvanometer Bridge
Vintage Leeds Northrup Potentiometer Indicator Tester Galvanometer Bridge
$58.50
quality
Leeds  Northrup Chart Recorder mdl 201 11 000 NN21
Leeds Northrup Chart Recorder mdl 201 11 000 NN21
$143.98
quality
Leeds  Northrup 10 OHM Resistance Standard FE8
Leeds Northrup 10 OHM Resistance Standard FE8
$143.98
quality
Leeds  Northrup MICROMAX CHART RECORDER
Leeds Northrup MICROMAX CHART RECORDER
$750.00
quality
LEEDS NORTHRUP RAYTUBE TEMP DETECTOR 240MV  3000 F
LEEDS NORTHRUP RAYTUBE TEMP DETECTOR 240MV 3000 F
$200.00
quality
LEEDS  NORTHRUP VOLT POTENTIOMETER 8687
LEEDS NORTHRUP VOLT POTENTIOMETER 8687
$95.00
quality
VINTAGE LEEDS  NORTHRUP 8686 S WITH FLUKE 840 A POTENTIOMETER
VINTAGE LEEDS NORTHRUP 8686 S WITH FLUKE 840 A POTENTIOMETER
$165.00
quality
LEEDS  NORTHRUP RESISTANCE THEMOMETER BRIDGE 8064 A
LEEDS NORTHRUP RESISTANCE THEMOMETER BRIDGE 8064 A
$105.00
quality
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
$50.00
quality
LEEDS  NORTHRUP Model 7555 TYPE K 5 POTENTIOMETER
LEEDS NORTHRUP Model 7555 TYPE K 5 POTENTIOMETER
$195.00
quality
LEEDS  NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
LEEDS NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
$125.00
quality
VINTAGE LEEDS  NORTHRUP RESISTANCE BRIDGE 4764
VINTAGE LEEDS NORTHRUP RESISTANCE BRIDGE 4764
$195.00
quality
LEEDS  NORTHRUP Model 7554 TYPE K 4 POTENTIOMETER
LEEDS NORTHRUP Model 7554 TYPE K 4 POTENTIOMETER
$195.00
quality
POTENTIOMETER LEEDS  NORTHRUP CO 682216 Vintage Lab Tool SUPERIOR Wooden Box
POTENTIOMETER LEEDS NORTHRUP CO 682216 Vintage Lab Tool SUPERIOR Wooden Box
$89.99
quality
LN Leeds  Northrup 4222 001 Ohm 10 milliohm Standard Resistor
LN Leeds Northrup 4222 001 Ohm 10 milliohm Standard Resistor
$495.00
quality
LN Leeds  Northrup 4222B 001 Ohm Standard Resistor
LN Leeds Northrup 4222B 001 Ohm Standard Resistor
$495.00
quality
LEEDS NORTHRUP 4973 10 305 1 000 CONDUCTIVITY CELL WITH TEMP COMPENSATOR D512592
LEEDS NORTHRUP 4973 10 305 1 000 CONDUCTIVITY CELL WITH TEMP COMPENSATOR D512592
$23.53
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 A 8064 2 A2 8064 3 A3 Thermometer Bridge Manual
Leeds Northrup 8064 A 8064 2 A2 8064 3 A3 Thermometer Bridge Manual
$20.00
quality
Leeds  Northrup 8064 8064 A Resistance Thermometer Bridge Direction Op Manual
Leeds Northrup 8064 8064 A Resistance Thermometer Bridge Direction Op Manual
$20.00
quality
Leeds Northrup 10548189 Blue Markers Lot of 30
Leeds Northrup 10548189 Blue Markers Lot of 30
$25.00
quality
Vintage and Rare Leeds  Northrup Voltmeter NR
Vintage and Rare Leeds Northrup Voltmeter NR
$19.00
quality
LEEDS  NORTHRUP 4221 1 OHM STANDARD RESISTOR
LEEDS NORTHRUP 4221 1 OHM STANDARD RESISTOR
$241.50
quality
VINTAGE LEEDS  NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
VINTAGE LEEDS NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
$125.00
quality
LEEDS  NORTHRUP LN Model 9876 m DC POWER SUPPLY
LEEDS NORTHRUP LN Model 9876 m DC POWER SUPPLY
$40.00
quality
LEEDS  NORTHRUP SILSBEE CURRENT TRANSFORMER TESTING SET 7150
LEEDS NORTHRUP SILSBEE CURRENT TRANSFORMER TESTING SET 7150
$250.00
quality
LEEDS  NORTHRUP 4725 VINTAGE OPEN DIAL WHEATSTONE BRIDGE
LEEDS NORTHRUP 4725 VINTAGE OPEN DIAL WHEATSTONE BRIDGE
$175.00
quality
LEEDS NORTHRUP CAT 4393 UNIVERSAL RATIO SET
LEEDS NORTHRUP CAT 4393 UNIVERSAL RATIO SET
$195.00
quality
Vintage Leeds  Northrup Potentiometer Indicator
Vintage Leeds Northrup Potentiometer Indicator
$173.42
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 AND NORTHRUP CO AC DC DECADE RESISTOR CAT NO 4756 Resistance
LEEDS AND NORTHRUP CO AC DC DECADE RESISTOR CAT NO 4756 Resistance
$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 7555 7555 1  Type K 5 Potentiometer Calibration Procedure
Leeds Northrup 7555 7555 1 Type K 5 Potentiometer Calibration Procedure
$20.00
quality
LEEDS  NORTHRUP SPEEDOMAX RECORDER 610002 TC TYPE K
LEEDS NORTHRUP SPEEDOMAX RECORDER 610002 TC TYPE K
$395.00
quality
Vintage Leeds Northrup potentiometer model 782646 wooden box tester free ship
Vintage Leeds Northrup potentiometer model 782646 wooden box tester free ship
$89.99
quality
Leeds and Northrup A19 030219 100460 CBR0215
Leeds and Northrup A19 030219 100460 CBR0215
$295.00
quality
Leeds Northrup Interface Board 205176
Leeds Northrup Interface Board 205176
$198.00
quality
Leeds Northrup PA Interface 205221
Leeds Northrup PA Interface 205221
$249.00
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
$249.00
quality
Leeds Northrup Logic CD Board 201176
Leeds Northrup Logic CD Board 201176
$695.00
quality
Leeds Northrup Circuit Board 064556 9014008 A18
Leeds Northrup Circuit Board 064556 9014008 A18
$495.00
quality
NEW LEEDS NORTHRUP 7079 CONDUCTIVITY RESISTIVITY TRANSMITTER D529772
NEW LEEDS NORTHRUP 7079 CONDUCTIVITY RESISTIVITY TRANSMITTER D529772
$60.00
quality
Leeds  Northrup Processor Data PC Board A18 054906
Leeds Northrup Processor Data PC Board A18 054906
$395.00
quality
Leeds Northrup Mini Station Board A9 030289
Leeds Northrup Mini Station Board A9 030289
$295.00
quality
Leeds Northrup Adjusting Current Board A3 054907
Leeds Northrup Adjusting Current Board A3 054907
$295.00
quality
Leeds  Northrup Millivolt Potentiometers 8686 8686 2 8686 3
Leeds Northrup Millivolt Potentiometers 8686 8686 2 8686 3
$144.00
quality
LEEDS  NORTHRUP MODEL 4300 PRIMARY VARIABLE LOW RESISTANCE STANDARD
LEEDS NORTHRUP MODEL 4300 PRIMARY VARIABLE LOW RESISTANCE STANDARD
$765.00
quality
Leeds  Northrup Temperature Potientiometer 8693 2 Vintage
Leeds Northrup Temperature Potientiometer 8693 2 Vintage
$194.99
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
Leeds  Northrup 1 OHM Resistance Standard FE12
Leeds Northrup 1 OHM Resistance Standard FE12
$143.98
quality
Leeds  Northrup 1 OHM Resistance Standard FE11
Leeds Northrup 1 OHM Resistance Standard FE11
$130.48
quality
LEEDS  NORTHRUP 063232 ANALOG MODULE CONTROL NEW OUT OF A BOX
LEEDS NORTHRUP 063232 ANALOG MODULE CONTROL NEW OUT OF A BOX
$407.00
quality
Leeds  Northrup 1000 OHM Resistance Standard FE15
Leeds Northrup 1000 OHM Resistance Standard FE15
$143.98
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
$59.99
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
$19.00
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
$19.00
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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