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 5910-01-144-9396
NSN 4140-01-324-3548
NSN 6620-01-245-0184
NSN 6110-00-161-4115
NSN 5930-01-261-7893
NSN 6650-00-292-9106
NSN 6110-00-155-4303
NSN 6145-01-644-5316
NSN 6650-01-324-4726
NSN 6220-01-158-5956
NSN 6145-00-170-7947
NSN 5945-01-129-6110