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 5895-01-367-0447
NSN 6610-01-322-1394
NSN 6135-00-269-5843
NSN 6650-00-769-3003
NSN 6610-00-895-9314
NSN 6110-01-475-4761
NSN 5998-01-260-9539
NSN 6645-01-236-6387
NSN 2925-01-359-4027
NSN 6620-00-182-7638
NSN 4140-01-426-0195
NSN 6685-01-625-4680