Bomb Station Distributor Selector SD-1 for TBM Avenger C-45 a winder and duration-selector is

a winder and duration-selector is visible at the bottom of the recording drum

With the left knob depressed

The indicator has labels showing service at US Naval Air Station Pensacola in January 1955 (see white label on side and blue stamp on back)

The knob rotates a small indexing pointer around the perimeter of the dial (sitting at 5 G's in the main photo)

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Bomb Station Distributor Selector SD-1 for TBM Avenger C-45 a winder and duration-selector isThis is an authentic WWII era Bomb Station Distributor Selector SD 1 as used in the US Navy's TBM Avenger multi purpose carrier based bomber. The Distributor Selector was located in the TBM's bombardier's compartment behind the flight deck. See photo and page from the TBM manual showing its location. According to the TBM Avenger Flight Manual date Nov 1944, the TBM could carry bombs in the following configurations: 12 100 lb bombs, 4 500 lb bombs, 1