Engine Gauge Unit (Triple), AN5773-1 TBM Avenger Sperti part number 11585

Sperti part number 11585

a removable drawer-type compensator

According to Andrea Salimbeti's website:

invented by George Reid (according to the 'all-knowing' Wikipedia) and made by Reid & Sigrist

The red/green markings on the scale match the operating limits for the C-46 according to the C-46 Flight Manual dated 1945

Engine Gauge Unit (Triple), AN5773-1 TBM Avenger Sperti part number 11585The WWII era Engine Gauge Unit (aka Triple Gauge), AN5773 1, displayed the performance of 3 engine parameters in one instrument: Oil Temperature, Oil Pressure, and Fuel Pressure. The AN5773 1 unit was used in the US Army Air Force fighters P 38L Lightning and P 63 King Cobra, according to their Maintenance Interchangeability Chart dated Feb 1945, as well as having been used in other military aircraft post war. This instrument is in reasonable