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Deciphering Seiko Case Back Information — Plus9Time
6309-589A] Looking for more info on my dad's Seiko. Serial# from 1983, bought in 1985. Can't find it in the Japanese catalogues from 83-85, or anywhere online. Smart looking watch, any ideas
Nicholas Hacko Watchmaker DIY Seiko 7S26 Sydney
How to tell when your Seiko watch was made (Part 1)
1973 Seiko 6106-7690 Actus Automatic | DC Vintage Watches
Seiko Serial Number Decoder. Find the date of a Seiko by serial numnber