Socketeer

Many years ago, around the time David Duvall was playing at his best and was probably Oakley's top ambassador for wrap around shades on the PGA Tour, I bought a set of Oakley Golf Specific Heaters. At the time it cost around £180. The set included: 1 folding M Frame 2 nose pieces 1 soft case (doubling as a wipe) 1 zip hard case 1 G30 Iridium lens 1 other lense which I can't identify. The whole thing has lasted well, having owned the kit for probably around 25 years, but the lenses are showing signs of the coatings deteriorating. I've contacted Oakley and await a reply but I'm not hopeful that they can be replaced. So, I'm looking into alternatives. I know it is possible to source Oakley copies that will fit the M Frame and they aren't half bad! But I need to identify the unidentified lens so that I can better source a replacement. Did anyone else buy any of these back in the day and can anyone help me out with the mystery lens? Of course I am assuming that the two lenses that came with the set, were set as standard.