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Optional for the Datsun 1200 was an 8,000 RPM Kanto-Seiki tachometer. It was usually housed in the round-gauge instrument panel to the left of the Speedometer. It may also be placed in the optional floor Console.
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Overview
USA 1972 Owners manual (see pages 8-9 for Tacho information):
The tachometer is electrically operated and indicates engine speed calibrated in hundreds of revolutions per minute (rpm). two color zones are on its face. For normal driving, your vehicle should be driven in the yellow or non-color sectors.
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PB110 
Options
S1 
Ute 
SSS 
B140
Location
Parts Catalog shows GL came with a Clock in the dash, and the GX came with an 8,000 RPM tachometer in the dash, while the clock was moved to the floor Console. Tachometer was optional on DX or GL round dash models.
Dash
PB110
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Tacho in dash, blank plate in Console
Tacho in dash, Clock in Console
Console
Specials Datsun 1200 SSS and Datsun 1200 S1 placed the tachometer in the floor console. It is preferable to have the Tachometer at eye-level, however these models came with square-gauge dashes.
SSS
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S1
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Wiring
See main article: Tachometer Wiring
Part Numbers
NO tachometer is listed for Sunny Truck, but only a Clock. Even so it is common to see tachometers installed in 1200 Trucks, as they fit the same.
24855-H1800 1200 TACHOMETER 8000 RPM [6400 redline]
24855-H2300 1200 TACHOMETER 8000 RPM GX
24855-H1075 1200 FACTORY RACE TACHOMETER Calibrated to 10,000 RPM with adjustable redline needle
24855-H3100 1972 B110 8000 RPM [Facelift] (Except GX)
24855-H3400 1972 B110 GX 8000 RPM [Facelift 6800 redline]
384 tachometer
620 Tachometer
The Datsun 620 truck tachometers fits Datsun 1200 and looks very similar. But 620 models have 7000 rpm yellow line for L20B engine (1200 tach has 6400 rpm redline).
1976-1979 620 Tachometer [7000 redline]
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620 in Japan did not have a factory tachometer option.
1972-1975 early 620 USA
* 24840-B6400 KIT-TACHOMETER OP -0775
* 24054-B6400 ASSY-CABLE,TACHOMETER
1976-1979 late 620 USA * 24855-B8000 ASSY-TACHOMETER OP 0875- * tachometer wiring is built into every 1976-1979 620
The later Tachometer Wiring is different. It is a typical tap connection, instead of the Datsun 1200 'passthru' induction wiring.
Comparison
620 Tachometer has no wiring loop:
Early 1200 Tachometer has wiring loop:
These two types are wired completely different. See Tachometer Wiring.
Facelift
Bprojects
Bprojects Sunny Truck tachometer, looks like genuine.
6500 RPM redline
Green to Illumination Black to Earth Red to I/G 12V Yellow/red to ignition coil - (minus)
Nissan Competition
1984 Nissan Competition Catalog
 | * TACHOMETERS
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24855-H1800 is the stock factory OPTION tachometer
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24855-H1075 is the 10,000 RPM tachometer
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10,000 RPM Tachometer
Sunny Sport option
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Tachometer using flat-plastic cover
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Gauges have long-reach brackets
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12,000 RPM Tachometer
Kanto Seiki 12,000 RPM unit, perhaps for mechanical tach drive
Mechanical Drive
Datsun Competition offered a mechanical tachometer.
See main article: Tach Drive
Aftermarket Tachometers
dash top 
console
on column
under dash 
Silvia tacho
three tachos
silvia
Photo Index
rev counter tacho tach rpm gauge タコメータ