It looks like it's just cosmetic issues with the case itself, as the movement looks clean. And since you say that everything runs ok and the dial is in great condition I think it may be ok. You may want to send it to a Heuer restorer like Abel Court in Europe or Craig Bergsma in the USA, there may be others but you need to make sure they know what they're doing with the case, sometimes they may even recommend leaving it alone.

~George

: Experts & Fellow Enthusiasts:

: Evaluating a watch for purchase and trying to understand what I am
: looking at around the case edge in these photos.

: To me, this looks like deterioration/degradation/corrosion of the
: inside of the case, but since I just wear watches and don't open
: them I thought I would ask for second opinion(s) from the
: experts.

: If this is in fact corrosion, how should I consider it in my offer
: for the watch? The dial is in great condition and everything
: works properly, so these photos suprised me a bit.

: I should point out that the seller is a standup gentleman and has
: been nothing but transparent, but he and I are sort of in the
: same boat experience wise. I have asked for higher res photos
: from him.

: Your input is appreciated and thanks!

: Bryce

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