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 4140-00-674-2856
NSN 5960-01-384-4603
NSN 6610-00-778-3150
NSN 6645-00-079-1430
NSN 5910-01-434-8866
NSN 5998-01-324-4452
NSN 6135-00-299-6918
NSN 5855-01-199-2046
NSN 5990-01-054-3332
NSN 6220-01-476-9155
NSN 5999-01-608-3908
NSN 5910-01-392-4817