Spring Military Aviation and Militaria Auction
Lot 119:
Description
A World War II-era Type B-2A Bomb Release Control, commonly referred to as an intervalometer, manufactured by the J.P. Seeburg Corporation of Chicago. This instrument was a standard component in United States Army Air Forces heavy and medium bombers, such as the B-17 Flying Fortress, B-24 Liberator, and B-25 Mitchell. It was designed to regulate the timing and ground distance between individual bombs when dropped in a sequence or train. The unit is housed in a rectangular metal casing with a black crinkle-finish. The front control panel features two primary adjustment dials with yellowed alphanumeric scales. The left dial is used to set the interval between bombs in feet, calibrated against the aircraft ground speed in miles per hour. The right dial is used for pre-setting the release sequence. The faceplate includes a toggle switch for select or train modes, an indicator light, and printed operational instructions including a mathematical formula for calculating trail settings. A riveted metal identification plate on the top of the housing is marked: CONTROL, BOMB RELEASE, TYPE B – 2 A (24 VOLTS D. C.), FIGURE 1 SPEC. NO. 93-24630-A, MFR’S. ASS’Y. PART NO. 105000, SERIAL NO. 15808, CONTRACT NO. W535-AC-27067, J. P. SEEBURG CORP., CHICAGO, U.S.A., PROPERTY, AIR FORCE, U.S. ARMY. A circular yellow Army-Navy inspection stamp is present on the front right corner of the faceplate, featuring the AN designation over A 107.
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