DT-501 Tachometer Manual
 

We desperately need the service/instruction manual, or even just
specificaitons, for the Shimpo DT-501 Gasoline Engine Tachometer. It
looks similar to the other common Shimpo units, but has an inductive
pickup. Shimpo has no information on this unit, it is too dated, does
anyone have a manual laying around that they wouldn't mind copying?
Even just the spec page would be great.

Thanks,
Steve