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My first Gruens. Precision 510 and N510R movements.


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Apparently it's James Bond's choice of watch!

Picked up this pair at an antique/estate sort of shop near me. The owner asked what I was looking for, and when I said wristwatches he pulled out several Ziploc bags full and let me dig through them. I picked up this pair for a nice price.

One case is in pretty rough shape, the other looks fairly good. Both movements seem reasonably clean, and the balances swing easily when I wiggle the watches. Interesting that one is shock protected and the other isn't.

I'll post more when I get around to working on them, but for now:

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A couple more inside the backs. Looks like service marks in one from 78 and 88.

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  • 3 months later...

Finally getting these guys in the repair rotation.

I'm starting with the N510R, since it's shock protected and will be less prone to damage on my clumsy wrist 🙂

Dial side

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Trying to keep track of the different bridge screws. One is missing, and I don't want to steal it from the other 510. Maybe I'll find a donor movement, since I need a stem or two anyway.

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Left-hand wound mainspring! Don't forget that when putting it back...

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All ready for a bath

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Snap!

I recently finished my Gruen 510 movement - though the case for mine is in a rather sad state; I'm going to try re-plating it (in nickel, it's not a gold one).

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Re. the screws, I got a few of the one gram mixed batches from ebay. I've only needed a couple of screws for things so far, both rare, minuscule types - but both in the mix, after enough time sorting through them! The ones such as normal bridge screws are quite common in those lots.

 

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