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Vintage seiko expensive to repair or overhaul?

Posted: 15 Oct 2017 23:58
by Kopitayjr
Hi all, im new to this forum.
Need some advise,
I have 2 vintage seikos left by my grandpa.

1) tuna 300m quartz model 7549 7010
2) Diver automatic 6309 7040

Both not working anymore. Wondering if it still can be repaired or overhaul? Really wish to get it working to wear it. Please help.