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 6620-01-575-9561
NSN 6685-01-294-9118
NSN 6645-01-660-3097
NSN 5998-01-189-1940
NSN 6645-00-616-1289
NSN 6645-01-508-9074
NSN 5945-01-428-9409
NSN 5990-00-495-0021
NSN 5965-00-946-6692
NSN 5915-00-025-1763
NSN 6240-00-246-5060
NSN 5975-01-642-3093