Leeds Northrup

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Leeds  Northrup Model 8692 Temperature Potentiometer
Leeds Northrup Model 8692 Temperature Potentiometer
$29.99
quality
Leeds  Northrup Electromax III Auto Tune Controller
Leeds Northrup Electromax III Auto Tune Controller
$299.00
quality
Vintage 1940s Leeds  Northrup Test Set No 5430 A Wheatstone Bridge Wood Box
Vintage 1940s Leeds Northrup Test Set No 5430 A Wheatstone Bridge Wood Box
$57.99
quality
LEEDS  NORTHRUP 074435 USPP 074435
LEEDS NORTHRUP 074435 USPP 074435
$348.45
quality
NEW LEEDS  NORTHRUP 078691 REV D
NEW LEEDS NORTHRUP 078691 REV D
$599.00
quality
NEW LEEDS NORTHRUP 099012 REGULATED VOLTAGE 120V AC 10MA POWER SUPPLY D399723
NEW LEEDS NORTHRUP 099012 REGULATED VOLTAGE 120V AC 10MA POWER SUPPLY D399723
$20.00
quality
Leeds and Northrup optical Pyrometer 2 units
Leeds and Northrup optical Pyrometer 2 units
$395.00
quality
Leeds and Northrup test device steampunk OLD
Leeds and Northrup test device steampunk OLD
$20.00
quality
LEEDS  NORTHRUP Test Set Resistance Measurements Galvanometer w Wooden Box USN
LEEDS NORTHRUP Test Set Resistance Measurements Galvanometer w Wooden Box USN
$79.99
quality
LEEDS  NORTHRUP HISTORIC LAB VOLTAGE STANDARD
LEEDS NORTHRUP HISTORIC LAB VOLTAGE STANDARD
$400.00
quality
NEW LEEDS NORTHRUP 3 WAY VALVE STRAINER 3 4NPT PVC PLASTIC B276798
NEW LEEDS NORTHRUP 3 WAY VALVE STRAINER 3 4NPT PVC PLASTIC B276798
$30.00
quality
LEEDS NORTHRUP 055867
LEEDS NORTHRUP 055867
$400.00
quality
J089 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
J089 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
$163.97
quality
9825 70871 605 14 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
9825 70871 605 14 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
$319.20
quality
8625 70871 605 14 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
8625 70871 605 14 LEEDS AND NORTHRUP INSTRUMENTATION AS IS
$319.20
quality
6015 08 1 0 00 00 1 LEEDS AND NORTHRUP CONTROLLERS AS IS
6015 08 1 0 00 00 1 LEEDS AND NORTHRUP CONTROLLERS AS IS
$504.00
quality
444508 LEEDS AND NORTHRUP CONTROLLERS AS IS
444508 LEEDS AND NORTHRUP CONTROLLERS AS IS
$288.75
quality
LEEDS  NORTHRUP 2402 TEMPERATURE CONTROL NEW GENERAL SIGNAL   id6015 6 0
LEEDS NORTHRUP 2402 TEMPERATURE CONTROL NEW GENERAL SIGNAL id6015 6 0
$45.00
quality
Leeds  Northrup Temperature Control Output 441 1 20 31 51 A723 Unused
Leeds Northrup Temperature Control Output 441 1 20 31 51 A723 Unused
$500.00
quality
LEEDS  NORTHRUP SPEEDOMAX MINIATURE RECORDER CHART PAPER 537234 4 1 4 L
LEEDS NORTHRUP SPEEDOMAX MINIATURE RECORDER CHART PAPER 537234 4 1 4 L
$9.00
quality
Vintage Leeds  Northrup Lab Grade Potentiometer Antique Scientific Electricalth
Vintage Leeds Northrup Lab Grade Potentiometer Antique Scientific Electricalth
$99.99
quality
NEW LEEDS NORTHRUP RED MARKER SET 82 27 0012 05
NEW LEEDS NORTHRUP RED MARKER SET 82 27 0012 05
$50.00
quality
NEW LEEDS NORTHRUP RED MARKER SET 054190
NEW LEEDS NORTHRUP RED MARKER SET 054190
$1.00
quality
Leeds  Northrup Ultrasonic Doppler Flowmeter 475 1 120 120V 25MA 4 20mA Used
Leeds Northrup Ultrasonic Doppler Flowmeter 475 1 120 120V 25MA 4 20mA Used
$74.65
quality
New Leeds  Northrup 018374 Alarm Assembly
New Leeds Northrup 018374 Alarm Assembly
$90.00
quality
SET OF 10 LEEDS  NORTHRUP RESISTORS WITH OIL BATH M
SET OF 10 LEEDS NORTHRUP RESISTORS WITH OIL BATH M
$2,100.00
quality
Leeds  Northrup Electronic Speed Changer 120V 50 60 Hz 351567
Leeds Northrup Electronic Speed Changer 120V 50 60 Hz 351567
$248.14
quality
Leeds  Northrup 8627 Optical Pyrometer NICE
Leeds Northrup 8627 Optical Pyrometer NICE
$600.00
quality
Leeds  Northrup 2610 100 12 2 01 300 802 809 Pressure Transmitter New Old Stk
Leeds Northrup 2610 100 12 2 01 300 802 809 Pressure Transmitter New Old Stk
$799.99
quality
Leeds  Northrup LN model LT 3946 10000 Ohm Lab Standard Resistor
Leeds Northrup LN model LT 3946 10000 Ohm Lab Standard Resistor
$995.00
quality
LEEDS  NORTHRUP CO Meter 2420B
LEEDS NORTHRUP CO Meter 2420B
$15.99
quality
LEEDS  NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
LEEDS NORTHRUP K5 9534 L5 UNBALANCED 750 ATTENUATOR
$175.00
quality
LEEDS  NORTHRUP POWER SUPPLY 099012  FOR PARTS REPAIR
LEEDS NORTHRUP POWER SUPPLY 099012 FOR PARTS REPAIR
$25.00
quality
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
LEEDS AND NORTHRUP 8686 IS A MILLIVOLT POTENTIOMETER
$100.00
quality
Vintage Leeds  Northrup Temperature Potentiometer model 8693 Untested
Vintage Leeds Northrup Temperature Potentiometer model 8693 Untested
$35.00
quality
LEEDS  NORTHRUP THERMOCOUPLE CAT 8867 VINTAGE 1123
LEEDS NORTHRUP THERMOCOUPLE CAT 8867 VINTAGE 1123
$150.00
quality
Leeds  Northrup Guarded DC Constant Voltage Power Supply 9878 117 volt 6 VA
Leeds Northrup Guarded DC Constant Voltage Power Supply 9878 117 volt 6 VA
$19.99
quality
Leeds and Northrup Co Type G 1 Mueller Temperature Bridge 8067
Leeds and Northrup Co Type G 1 Mueller Temperature Bridge 8067
$1,261.61
quality
LEEDS  NORTHRUP MODEL 8690 MILLIVOLT POTENTIOMETER
LEEDS NORTHRUP MODEL 8690 MILLIVOLT POTENTIOMETER
$49.99
quality
LEEDS NORTHRUP A1A1A1XA1 SERVO AMPLIFIER PCB CIRCUIT BOARD B417433
LEEDS NORTHRUP A1A1A1XA1 SERVO AMPLIFIER PCB CIRCUIT BOARD B417433
$60.00
quality
Leeds  Northrup Oxygen Monitor Transmitter 3106 NNN 49385
Leeds Northrup Oxygen Monitor Transmitter 3106 NNN 49385
$649.00
quality
LEEDS NORTHRUP SPEEDOMAX CHART RECORDER 115 230 VAC 063205
LEEDS NORTHRUP SPEEDOMAX CHART RECORDER 115 230 VAC 063205
$349.99
quality
LEEDS NORTHRUP 445847 LOGIC CONTROL PCB CIRCUIT BOARD REVISION C B348060
LEEDS NORTHRUP 445847 LOGIC CONTROL PCB CIRCUIT BOARD REVISION C B348060
$191.00
quality
LEEDS  NORTHRUP LN GENERAL SIGNAL MICROMAX 081103 20VAC 60Hz
LEEDS NORTHRUP LN GENERAL SIGNAL MICROMAX 081103 20VAC 60Hz
$500.00
quality
VINTAGE 50s Leeds  Northrup Co Potentiometer NUCLEAR ERA
VINTAGE 50s Leeds Northrup Co Potentiometer NUCLEAR ERA
$500.00
quality
HONEYWELL LEEDS  NORTHRUP H2 ANAYLYZER 7866001111003
HONEYWELL LEEDS NORTHRUP H2 ANAYLYZER 7866001111003
$3,000.00
quality
VINTAGE LEEDS  NORTHRUP LN AMPLIFIER R 820 1 PROD  57258
VINTAGE LEEDS NORTHRUP LN AMPLIFIER R 820 1 PROD 57258
$50.00
quality
Used Leeds  Northrup pH Analyzer PLC 7082 41 086311 120 240V 50 60HZ 15VA
Used Leeds Northrup pH Analyzer PLC 7082 41 086311 120 240V 50 60HZ 15VA
$299.00
quality
Leeds  Northrup 063918 Control Card 63918 LN
Leeds Northrup 063918 Control Card 63918 LN
$199.00
quality
Leeds  Northrup 070253 Control Card 70253 LN
Leeds Northrup 070253 Control Card 70253 LN
$199.00
quality
Leeds  Northrup 046315 Control Card 46315 LN
Leeds Northrup 046315 Control Card 46315 LN
$95.00
quality
Leeds  Northrup 046315
Leeds Northrup 046315
$375.00
quality
VINTAGE ELECTROMAX LEEDS  NORTHRUP LN AMPLIFIER
VINTAGE ELECTROMAX LEEDS NORTHRUP LN AMPLIFIER
$50.00
quality
Leeds  Northrup 074825 CAT Manual Station 120 220V 4A
Leeds Northrup 074825 CAT Manual Station 120 220V 4A
$49.99
quality
Leeds Northrup 445846
Leeds Northrup 445846
$150.00
quality
Leeds  Northrup LN Model LT 3635 Lab Standard Resistor 100 ohm calibrated
Leeds Northrup LN Model LT 3635 Lab Standard Resistor 100 ohm calibrated
$995.00
quality
NEW LEEDS  NORTHRUP CO GEAR MOTOR KCI 24 KCI24 017342 25 120 VOLT 50 60 HZ
NEW LEEDS NORTHRUP CO GEAR MOTOR KCI 24 KCI24 017342 25 120 VOLT 50 60 HZ
$39.95
quality
LEEDS NORTHRUP A1A1AXA2X 12PIN PRE AMPLIFIER PCB CIRCUIT BOARD B348197
LEEDS NORTHRUP A1A1AXA2X 12PIN PRE AMPLIFIER PCB CIRCUIT BOARD B348197
$85.00
quality
Leeds  Northrup 1000 Ohm 1K Standard Resistor
Leeds Northrup 1000 Ohm 1K Standard Resistor
$152.15
quality
Leeds  Northrup Model 8070 Standard Resistor
Leeds Northrup Model 8070 Standard Resistor
$143.65
quality
NEW Leeds  Northrup Speedomax 250 Chart Paper Roll PN 01159573 545434 G
NEW Leeds Northrup Speedomax 250 Chart Paper Roll PN 01159573 545434 G
$15.99
quality
VINTAGE LEEDS  NORTHRUP SELF INDUCTANCE Tester Milli Henrys
VINTAGE LEEDS NORTHRUP SELF INDUCTANCE Tester Milli Henrys
$65.00
quality
NEW LEEDS NORTHRUP 055867 MULTIRANGE BOARD REV F AMPLIFIER SERVO D230214
NEW LEEDS NORTHRUP 055867 MULTIRANGE BOARD REV F AMPLIFIER SERVO D230214
$250.00
quality
LEEDS NORTHRUP 444508 AE0170 DRIVER BOARD AMPLIFIER SERVO D230202
LEEDS NORTHRUP 444508 AE0170 DRIVER BOARD AMPLIFIER SERVO D230202
$250.00
quality
Leeds Northrup Cat 8070 Resistor Standard
Leeds Northrup Cat 8070 Resistor Standard
$89.99
quality
LEEDS  NORTHRUP 228261 PC BOARD
LEEDS NORTHRUP 228261 PC BOARD
$595.00
quality
LEEDS NORTHRUP 055867 MULTIRANGE BOARD REV G G1 AMPLIFIER SERVO D230183
LEEDS NORTHRUP 055867 MULTIRANGE BOARD REV G G1 AMPLIFIER SERVO D230183
$200.00
quality
LEEDS  NORTHRUP SPDT SYNCHRONOUS CONVERTER 354156
LEEDS NORTHRUP SPDT SYNCHRONOUS CONVERTER 354156
$50.00
quality
Leeds and Northrup 130031 Voltage Standard Power Supply
Leeds and Northrup 130031 Voltage Standard Power Supply
$135.00
quality
Leeds  Northrup Model 4775 Decade Resistor Box
Leeds Northrup Model 4775 Decade Resistor Box
$39.99
quality
Leeds  Northrup Co Volt Box Attenuator Cat 7592
Leeds Northrup Co Volt Box Attenuator Cat 7592
$18.00
quality
LEEDS  NORTHRUP LN MULTIPLE RANGE POTENTIOMETER INDICATOR
LEEDS NORTHRUP LN MULTIPLE RANGE POTENTIOMETER INDICATOR
$50.00
quality
Leeds and Northrup chart paper 690112
Leeds and Northrup chart paper 690112
$5.00
quality
NEW LEEDS  NORTHRUP LOGIC BOARD 046263 NEW NO BOX
NEW LEEDS NORTHRUP LOGIC BOARD 046263 NEW NO BOX
$679.99
quality
Leeds  Northrup Star I Industrial Controller
Leeds Northrup Star I Industrial Controller
$100.00
quality
Early Leeds and Northrup Potentiometer 54526 Testing Equipment for Parts
Early Leeds and Northrup Potentiometer 54526 Testing Equipment for Parts
$9.99
quality
Leeds Northrup 445855 Rev B 1 Mother Card A A1A1A1X
Leeds Northrup 445855 Rev B 1 Mother Card A A1A1A1X
$159.60
quality
Leeds and Northrup 445857 Rev C servo amplifier A1A1A1XA1
Leeds and Northrup 445857 Rev C servo amplifier A1A1A1XA1
$99.60
quality
INCOLN THERMAL CONVERTER CW10 LEEDS  NORTHRUP
INCOLN THERMAL CONVERTER CW10 LEEDS NORTHRUP
$99.99
quality
LEEDS AND NORTHRUP COMPANY METER TESTED IN 1969 VINTAGE
LEEDS AND NORTHRUP COMPANY METER TESTED IN 1969 VINTAGE
$40.00
quality
LEEDS NORTHRUP A1A1AX 445855 MOTHER CARD PCB CIRCUIT BOARD B1 B313095
LEEDS NORTHRUP A1A1AX 445855 MOTHER CARD PCB CIRCUIT BOARD B1 B313095
$170.00
quality
LEEDS AND NORTHRUP CONDUCTIVITY CELL 4801 10 03 11 000
LEEDS AND NORTHRUP CONDUCTIVITY CELL 4801 10 03 11 000
$45.00
quality
VINTAGE LEEDS  NORTHRUP POTENTIOMETER WOODEN CASE Scintilla Bendix Sidney NY
VINTAGE LEEDS NORTHRUP POTENTIOMETER WOODEN CASE Scintilla Bendix Sidney NY
$39.99
quality
LEEDS NORTHRUP 8690 MILLIVOLT POTENTIOMETER GALVANOMETER
LEEDS NORTHRUP 8690 MILLIVOLT POTENTIOMETER GALVANOMETER
$65.00
quality
LEEDS  NORTHRUP 7074 71 01 606 000 USPP 70747101606000
LEEDS NORTHRUP 7074 71 01 606 000 USPP 70747101606000
$52.32
quality
LEEDS  NORTHRUP 7074 71 01 641 000 USPP 70747101641000
LEEDS NORTHRUP 7074 71 01 641 000 USPP 70747101641000
$52.32
quality
NEW LEEDS NORTHRUP 056382 PCB CIRCUIT BOARD REV A1 A D230938
NEW LEEDS NORTHRUP 056382 PCB CIRCUIT BOARD REV A1 A D230938
$80.00
quality
LOT 11 NEW LEEDS NORTHRUP 528901 RECORDER CHART PAPER D230948
LOT 11 NEW LEEDS NORTHRUP 528901 RECORDER CHART PAPER D230948
$40.00
quality
LEEDS AND NORTHRUP SPEEDOMAX RECORDER
LEEDS AND NORTHRUP SPEEDOMAX RECORDER
$1,099.99
quality
081103 MICROMAX LEEDS NORTHRUP INTERFACE CONTROLLER
081103 MICROMAX LEEDS NORTHRUP INTERFACE CONTROLLER
$199.00
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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