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 6610-01-498-4063
NSN 6320-00-242-3300
NSN 5905-01-145-5990
NSN 6320-01-609-8903
NSN 4140-01-415-3363
NSN 5998-01-602-2453
NSN 5920-00-519-7664
NSN 2925-01-354-1752
NSN 6110-01-607-7478
NSN 5930-01-303-6170
NSN 4140-01-535-3479
NSN 6645-00-862-2904