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 4140-00-256-1471
NSN 5990-00-576-0386
NSN 2925-01-495-9054
NSN 5985-01-142-3431
NSN 5895-00-258-9135
NSN 5990-00-754-2842
NSN 6220-01-454-6767
NSN 5990-00-908-4252
NSN 5985-01-213-1972
NSN 5990-01-204-7576
NSN 6650-01-145-5173
NSN 6320-00-194-4252