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 5999-01-401-5322
NSN 5835-00-143-4153
NSN 6650-01-168-1659
NSN 6145-01-461-9881
NSN 5920-01-433-6817
NSN 6135-00-613-1068
NSN 6130-00-387-2051
NSN 5835-00-148-9719
NSN 6220-01-467-9608
NSN 7035-00-349-8571
NSN 4140-00-152-7092
NSN 6610-01-188-8163