Rochester Optical M40 / M42 Mask Optical Insert Kit. This kit is new and has never been used. Consists of the 6540-01-389-7152 Mount Frame and 6540-01-264-1348 (PN RPOLCNW) Plastic Prescription Lens Carrier. According to the enclosed instruction sheet it is for use with the M40 /M42 Gas Mask. They are new in the original package.
This is the description according to the NSN number: "PLASTIC, CLEAR, 52X42 EYE, 20 BRIDGE; HOLDS PRESCRIPTION LENSES; USED WITH BALLISTIC LASER EYEWEAR PROTECTION GOGGLES"
Shipping Weight: 1 lbs.