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Original Erie Proving Ground interoffice memoranda naming Lt
as suggested by the "PH" marking (indicating a phosphorus incendiary component) and blue tip on the middle round
There is no date stamp or makers emblem present
Original WWII-era aircraft gyro flux gate compass master indicator
known for its high-capacity magazine system
Signal Corps TS-47/APR Test Oscillator DTG Original Erie Proving Ground interofficeSignal Corps TS 47 APR Test Oscillator Fairchild Camera & Instrument Corp. Original WWII era Signal Corps Test Oscillator TS 47 APR, made by Fairchild Camera and Instrument Corp., New York. Plate lists 80 115 230V A. C., 502600 C. P. S. and 6. 3V D. C. operation. Housed in its original black carry case with latches, handle, power cord, plug, and internal control panel marked in megacycles. Nice WWII radar radio test equipment piece for collectors,
