By Polaroid. Stores reference 22c/882. Intended for use when flying over water surfaces and under severe reflected-glare conditions. They provided an excellent filter for use in submarine spotting and coastal reconnaissance. The frame is made of light green tinted moulded acetate in one piece, having two semi-circular side-shields attached with nickel plated hinges. A chamois covered sponge nosepiece is stitched to the frame and the spectacles are fitted with a simple adjustable black elastic strap. The lenses are laminated Polaroid safety glass. This pair has a very good undamaged frame and side-shields with good tight hinges. The lenses have light delamination marking but display very well. The headstrap is good, a little faded, with light surface corrosion on the adjustment buckle and good elastication The nosepiece is complete/undamaged. Air Ministry marked with reference numbers, all engraved into the sideshields. Also has an A.I.D. mark (yellow). Complete with the original card box of issue showing wear and use. Also comes with instruction sheet as shown. The MK.VI series were not produced in large numbers compared with other goggles and spectacles and are now quite rare to find. A good/good '+' pair. Stock code G23435.