Motometers
by John & Henri Boggs.

Metro Scope - Benson Favorite.

This is the Metro Scope, Benson Favorite made by the Auto Radiator Meter Co. of Seattle.  It is 2-3/4" in diameter, made from brass and nickel plated.  It was so called because as the water temperature rises, the two red flags start moving together from each side until the opening is all red.  This is indicated by the Pyro mark on the centre of the dial.  When the flags show a V, the temperature would be read as average.