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 6240-01-471-1634
NSN 7035-01-474-9537
NSN 6130-01-043-1070
NSN 2925-01-506-6975
NSN 5855-01-184-8089
NSN 6110-00-353-0139
NSN 5910-00-962-7534
NSN 5999-00-388-0584
NSN 5975-01-599-7856
NSN 5998-01-140-1337
NSN 6650-01-568-5750
NSN 4140-01-240-3300