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 4140-00-420-0251
NSN 6645-00-589-0143
NSN 2925-01-330-2988
NSN 5985-00-420-1260
NSN 5975-00-224-9154
NSN 5960-01-089-8155
NSN 5985-01-371-6007
NSN 5910-00-017-0477
NSN 5999-00-947-6046
NSN 4140-01-210-6747
NSN 5999-01-131-0427
NSN 5975-01-418-0376