03-27-2012, 10:17 PM
Might the square feature be the result of a repair? Possibly a manufacturing error patched with a small sheet?
It would be interesting to see the interior of the mask at that point. A bit of x-raying would be useful too, for example, a mark due to an impactor should show micro-fractures.
It would be interesting to see the interior of the mask at that point. A bit of x-raying would be useful too, for example, a mark due to an impactor should show micro-fractures.