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This is super cool! Kinda want to try it next weekend...

Seeing a lot of commenters wondering if the seals on the watch will manage to keep water out/oil in. Anyone know if it's possible to replace the o-rings or anything like that?

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The entire watch is 10$.

Yeah, I’m aware. I wouldn’t really care if the watch itself died, but leaking oil would be a bit annoying and making things that should fall apart last longer is often a fun challenge.

The o-ring is pretty flimsy (you can see it in a few pictures), but some have done this mod and have worn their F-91Ws without any leakage for 5+ years, so I expect it to be "good enough."

Good to know. Thanks for the info and for writing the original post about this!

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