Vintage Military Frequency Meter TS-33/AP Temporary Instructions Manual Confidential

Original vintage military technical manual titled “Temporary Instructions for Frequency Meter TS-33/AP.” This manual was originally issued with a CONFIDENTIAL security classification and contains period military security notices referencing both U.S. and Royal Air Force handling requirements.

The front cover is numbered Serial No. 1375 and has handwritten markings indicating the manual was later unclassified/declassified, dated Nov. 1960.

A scarce piece of early military radar/electronics test-equipment documentation and an interesting collectible for military communications, radar, electronics, or technical-manual collectors.

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