Croton Chronomaster

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1st Gen indeed, and for sure it worth service/repair it!

Now, be careful because I think the Chronograph Sea Diver used radium, not tritium.. A Geiger counter should go crazy next to this one, confirming radium presence. If it would be for my own usage, I will contact a skilled person and ask to relume the hands as they are flaking, making the watch especially dangerous if opened...

The hand relume would be the only cosmetic work I would do. You can eventually replace the chrono (central) hand as it seems bent a bit but good luck finding an original one I guess. Mine (Gen2) also had a slightly bent chrono hand, and I did not even bother to search for one

Cheers for the advice. Got the watch from Dad today and will be taking it a local vintage watch specialist to get it serviced and repair the movement. Although I hear it can be hard to find some Venus 210 parts. Sub seconds is working fine and it seems to keep good time, the pushers aren't working though - I think there's a broken spring somewhere.

Not sure about reluming the hands, may leave them if I can for the time being. The lume actually still works on the hands which I found surprising.
 
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Cheers for the advice. Got the watch from Dad today and will be taking it a local vintage watch specialist to get it serviced and repair the movement. Although I hear it can be hard to find some Venus 210 parts. Sub seconds is working fine and it seems to keep good time, the pushers aren't working though - I think there's a broken spring somewhere.

Not sure about reluming the hands, may leave them if I can for the time being. The lume actually still works on the hands which I found surprising.
Radium can still light up when it gets a blast of light. Just don’t lick it.
 
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The relume is only a matter of personal preference here. I will feel safer because of the flakes but no one will blame you not doing it (most may still consider it as a crime even if it flakes 😁)

Just tell your watchmaker about radium presence to be sure he is aware of it (especially as all other CASD used tritium)