The Boyce MotoMeter was patented in 1912, and was used in automobiles to show the temperature of the radiator.
Measures 5 1/2" x 6" x 3" for a 1 1/2" radiator opening.
Arro-Meter Jr. Indian Chief Head Motometer A2771
Alps/Iwaya Japanese Tin Toy 1957 Chrysler New Yorker with Box A2919
Carter Carburetor In-Store Countertop Display A2870
Hastings Piston Rings Compression Test Station Sign AP1603