Loose Regulator Pin

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So, I have this late 40s Seiko cal. 10B "Chronometer" watch that I received in what was described as running condition, and with a supplied photo of a relatively clean-looking movement. I have another Chronometer Seiko (identical movement) from the same era with some issues, but a much nicer case and dial configuration. My plan was to overhaul this movement, then swap the case and dial over.

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The watch was indeed…

Loose Regulator Pin

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