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 6320-01-323-1947
NSN 5930-01-551-1819
NSN 7035-01-514-2221
NSN 5905-01-076-4109
NSN 4140-01-037-1867
NSN 6645-00-033-8714
NSN 6650-00-176-1911
NSN 6620-00-882-2479
NSN 6320-00-506-2314
NSN 5950-00-146-4152
NSN 6645-01-552-9447
NSN 5930-01-246-8624