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One I know the scales ...

Two the patterning of the corrosion, see the way it sorta follows the pattern in the scales??? look at the tang, see the line???

Three the general look of the scales...

I think maybe from the pics that you might have Celluloid rot on the Puma...
Separate it from any other razors...

Some ways to tell for sure.

Smell - put the razor in a zip-lock baggie open...