Here's a very nice, (but not perfect), OEM / NOS tach for the 1972 Yamaha JT-2
Part number: 338-83510-30
There are two very minor blemish's as stated below:
A slight scratch in glass, located near the center ... just above the right face plate screw
A shallow dent, the size of a pin head ... in the top edge of the upper rim / trim ring
Neither flaw is readily nocticable, but I thought the buyer should know.
Also note, that the tach's wire harness is not included.
Priced accordingly at ... $99.95 + $7.95 shipping within the USA
International buyers will pay actual shipping costs.
If interested, please contact me at: Yamadave@gmail.com