You understand what a 'franken' or 'Frankenstein' means? Who does it is irrelevant, as is the intent or perception of how good it is.
If a movement that spent 50 years in a basic Geneve ends up being used with modern, legit service parts, it doesn't suddenly switch to being a Seamaster 300 movement. For most of its history and most importantly in the Omega archives, that serial corresponds to a Geneve and not a SM300.
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