Motometers
by John & Henri Boggs.

Boyce 2-1/4" - Midget Model.

This is a die-cast zinc, nickel plated flip-top cap.  The cap is formed as a stylized eagle, and its overall dimensions, wing tip to wing tip, is some 8".  There is also a larger version of this cap.  The Boyce motometer is a 2-1/4" Midget model.  The eagle's head is pulled forward to release the flip-top cap, allowing the engine coolant to be added to the radiator.

The front attachment, where an initial would normally go, has a white cross design on a red background inside a blue glass-enamelled ring.  A large selection of cap attachments were available.  These ranged from initials, to fraternal organizations, to symbols.  This is one of the more colourful examples.