Rustpot
M Frame Lover
If the cutter used when they cut the lenses and beveled the edges was dull (or a sloppy job overall) you might have a lot of high spots that are inducing the iridium to flake off. A loose fit of the lens might be rubbing the coating and chipping it off at the edges as well.
My old XX had a touch of that going on, but not that bad. My Heater lens in my M-Frames has a very rough cut to it, I've been very cautious when swapping that lens around in the frame to avoid any damage from the iridium on the rough edge.
My old XX had a touch of that going on, but not that bad. My Heater lens in my M-Frames has a very rough cut to it, I've been very cautious when swapping that lens around in the frame to avoid any damage from the iridium on the rough edge.