Motometers
by John & Henri Boggs.

Boyce - Flint Dial Insert.

This Boyce motometer is 3-3/8" in diameter and has a Flint dial insert.  It is mounted on a Himes adjustable radiator cap.  The cap is marked Pat. 5. 31. 21.

The cap is in two pieces, this allows it to be fitted to the vehicle before the motometer and wings.  They can then be fitted, ensuring proper alignment.