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 6610-01-340-1761
NSN 6220-01-607-1917
NSN 6110-01-497-5827
NSN 5915-01-012-0791
NSN 5990-01-411-5930
NSN 6105-01-106-6355
NSN 6145-00-100-4358
NSN 7035-00-054-3414
NSN 6645-01-010-3746
NSN 6685-01-065-3511
NSN 5905-01-209-1885
NSN 6240-01-433-3648