The Lewis Engine Co. Cylinder Head Temperature CHT Indicator 17AT4B

AIRCRAFT ELECTRIC TEMP INDICATOR 147B30A SA MS28008-1 BY LEWIS ENGINEERING

147B8 Lewis Temperature Resistance Indicator (CORE)

163B137 Lewis Engineering Oil Temperature Indicator

162B2 Lewis Engineering Temperature Indicator (Core)

Huey etc. Indicator Temp stock # 6126-147B31A, Lewis Mfg. Co. (Cab. far right)

76B502A Lewis Dual Cylinder Temperature Indicator (CORE)

49B522A Lewis Exhaust Gas Temperature Indicator (Core) (SA)