A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.
Classification: Clock or watch glass; glasses for noncorrective spectagles not optically worked; hollow glass spheres and their segments for the mnfctr ofsuch glasses
NSN 5999-01-220-1929
NSN 4140-01-564-9921
NSN 5999-00-916-8907
NSN 6610-00-661-1797
NSN 5945-00-648-6237
NSN 5925-01-153-0144
NSN 5915-01-186-5922
NSN 5996-00-161-4202
NSN 6110-01-182-8256
NSN 2925-01-027-1293
NSN 5910-01-026-3352
NSN 6135-01-455-9646