Seiko 7a28, 7a38 battery change day ....... | The Watch Site
Seiko 7A28 pt 2: The Quiet Beauty - Worn & Wound
7a38-7270] I changed my battery today, and my watchmaker told me is untouched inside. 1988, by 3 years with me and the most worn watch in this time. Looks like is inspired
Seiko] 7A38-7280 : r/Watches
MAXELL 394 SR936SW aka AG9 - 1 Battery Official OEM