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 5855-01-500-2531
NSN 6220-01-265-2705
NSN 5965-01-182-3384
NSN 5990-01-499-6930
NSN 4140-00-307-2732
NSN 6620-01-277-8471
NSN 6145-00-610-2283
NSN 6135-01-238-2878
NSN 5965-00-905-7561
NSN 2925-01-336-8019
NSN 2925-01-079-6229
NSN 6220-00-452-5308