R2 Gold lens. Inside surface has these colorful spots in the lower section. Absolutely nothing visible when wearing or against a light, just when light reflects off the inner surface at a certain angle, these spots become visible. Pics attached.
What causes this? How serious is it? Does it spread?! To what extend does it reduce value or desirability of an otherwise mint full set?
Thanks for any advice, lens experts.
What causes this? How serious is it? Does it spread?! To what extend does it reduce value or desirability of an otherwise mint full set?
Thanks for any advice, lens experts.