47B40, Cessna 310, 340 Overhauled Temperature Indicator

2 1/4" Cessna 310, 340 Overhauled Temperature Indicator. Manufactured by The Lewis Engineering Company. P/N 47B40. It operates with both 12V and 24V electrical systems. No tag with it, just an id tag affixed on top of indicator stating it was overhauled as shown on photo.