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 4140-01-658-2793
NSN 6220-01-361-8946
NSN 6145-00-007-1620
NSN 6620-01-480-3407
NSN 5950-01-037-4298
NSN 6135-01-466-3980
NSN 5835-00-931-5568
NSN 5990-01-239-1474
NSN 5996-01-294-2679
NSN 5910-00-472-5188
NSN 5990-00-800-2521
NSN 6645-01-580-8923