Cold War-dated gun or bombsight optical window, comprised of a spherical glass dome made of fused silica that measures 4" x 2.5", with inner rim marked "497." Includes the original shipping box stamped "Reusable Container and Dunnage, Do Not Destroy," with affixed parts label: "660_-00-606-115_, 28215500010, DOME, 1 ea., F34601-80-C-1916. A1-81." This particular dome-like optical window resembles examples similar to a Boeing B-54 bomber gunsight (1947-1949) and a Farrand Y-7 bombsight (circa 1952).
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