7009-3131] considering buying this vintage day date and I'm quite new to collecting watches so I was wondering if it's a good idea, and if there's a way of authenticating the authenticity
Vintage Seiko 5 Automatic 21Jewel Movement No 7009-3131 Date/Day Wrist Watch | eBay
Vintage SEIKO 5 7009-3131 Automatic 17 Jewels Japan Watch Working Condition | WatchCharts
90's Authentic Seiko 5 Automatic 7009-3131 Japan Made - Etsy 日本
OROLOGIO DA UOMO Vintage Seiko 5 7009-3131 A2 Automatico 17J Giapponese (06) EUR 3,55 - PicClick IT