Original Gas Mask Spare Lenses Book They are etched with various

They are etched with various numbers in the glass

There are stains on the cuff of the sleeve

using material cut from the inside area between the buttons

but I didn't want to start prying on it just to get a look inside

Original Gas Mask Spare Lenses Book They are etched with variousNew old stock spare lenses for your gas mask. These are war time manufacture, dates vary between 1942, 43 and 44. Good to complete your gas mask can or replace your old cloudy broken lenses. Each packet contains one pair of lenses. There are a few different variations in the printing on the packets, see photos. Packaging shows wear. Some are more yellowed than others. Limited supply. Price is for one packet.