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Deciphering Seiko Case Back Information — Plus9Time
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Seiko Serial Numbers Complete Guide and Date - Millenary Watches
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Vintage Seiko World Time - Decoding Seiko Part Numbers, Model and Serial No
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Vintage Seiko World Time - Decoding Seiko Part Numbers, Model and Serial No
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![Identification PSA/ 6309] Here's how to ID every Seiko : r/Seiko](https://i.redd.it/0jcx8bsncc381.jpg "Identification PSA/ 6309] Here's how to ID every Seiko : r/Seiko")