9910247-2, DST1800-2, Twin Cessna Exhaust Gas Temperature Gauge
3 1/8" Twin Cessna Aircraft Exhaust Gas Temperature / EGT Indicator. Manufactured by Aero-Mach. Model DST1800-2. P/N 9910247-2. It operates with both 14V and 28V electrical systems. No probes or sensors included with indicator. Only what you see on photo comes with it. It was removed from a salvage aircraft.