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6139-7020
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  1. Watchmaking & Tinkering
    Hello, first time poster here. I was looking for a replacement crystal gasket for Seiko Speedtimer 6139-7020 and 6139-7010. I have tinkered just enough with these watches to feel comfortable replacing crystal and gaskets on my own. Given that the watch itself is from 1970s, I can understand that...
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