Mint #536 Natural Gun Creases Or Damaged?

Pictured is a #536 perf 12.5 offset. It is MNH. Is this stamp damaged or are these creases natural?

Looks like gum wrinkles and the gum is also dried out.

Those appear natural.

Natural gum/paper wrinkles. Seen by some as a 'fault' and would likely get a note on a certificate if sent in for expertizing.

Not "likely", but certainly.

I would call them 'gum bends' - they don't appear to have broken the paper fibers. If the bends get so bad that they break the paper fibers, then I call them 'gum creases'. Both are natural and are considered 'faults' although not egregious faults. How do you know if they have broken paper fibers? Dunk the stamp in watermark fluid. Broken fibers will look like dark spots or dark lines in fluid. Gum creases/bends are fairly common for the era.

The examples on this particular stamp would be called gum creases on a cert. They are noticeable on the face of the stamp.

Thanks to all. It helped me in purchasing this item.