![Seiko 6139-6002: what parts are aftermarket and, more importantly, how can you tell? Didn't cost much and condition is obviously too good to be original, just keen to learn a little about Seiko 6139-6002: what parts are aftermarket and, more importantly, how can you tell? Didn't cost much and condition is obviously too good to be original, just keen to learn a little about](https://preview.redd.it/09gitbi8yuo41.jpg?auto=webp&s=e25837d54774358281d8143b28988e2a633a8961)
Seiko 6139-6002: what parts are aftermarket and, more importantly, how can you tell? Didn't cost much and condition is obviously too good to be original, just keen to learn a little about
SEIKO MODS — Four Forty Four PM- Seiko Mods•Custom Seiko Watch Modifications•Seiko Diver SKX007 Mods
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