Motometers
by John & Henri Boggs.

Boyce - Chevrolet Dial Insert.

This Boyce motometer with a Chevrolet dial insert is 2-1/4" in diameter.  It is mounted on a nickel plated dog-bone style flip-top cap which has cream coloured onyx balls on each end.  The latch mechanism is an eagle's head that moves forward to release the cap.