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 5920-01-537-8996
NSN 5996-01-633-7979
NSN 4140-00-191-1236
NSN 6650-01-325-9824
NSN 6645-01-282-1928
NSN 5985-01-626-5642
NSN 5960-00-240-7727
NSN 5930-01-469-2218
NSN 5855-00-118-8762
NSN 6220-00-672-4189
NSN 5965-01-433-1974
NSN 6650-00-401-7896