MIL-G-81704, MILITARY SPECIFICATION: GLASS, AIRCRAFT INSTRUMENT, LIGHTING WEDGE AND COVER (24 MAR 1969)

MIL-G-81704, MILITARY SPECIFICATION: GLASS, AIRCRAFT INSTRUMENT, LIGHTING WEDGE AND COVER (24 MAR 1969)., This specification covers requirements for lighting wedges and cover glasses for use in integrally lighted and unlighted aircraft instruments.