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HELMET CASE SS 6309-8070 GRAY DIAL VINTAGE SEIKO 5 MEN'S AUTOMATIC WRISTWATCH | eBay
A short-text Seiko 6309-7040, fresh off ebay - YouTube
Seiko 6309 – Analog:Shift
![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")