Looks like the old Sun Tachs from years ago but the Sun name if not on the face.
This would be only a piece of the unit. The transmitter box would also be required The low Max. RPM reading does indiacte if from a truck or school bus.
As an example a tachometer was available as an option on a 1960 C60 truck with a V-8 engine.
Option # 266, $45.00 and would have been a Sun Tach. and probably less the Sun name.
Edited by Chev Nut (02/04/10 06:44 AM)
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Chevgene