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
w713] SEIKO 7A38-7030 CHRONOGRAPH All original Quartz New battery EX | eBay
w987] SEIKO 7A38-7030 SPEED MASTER Titanium Original band New battery EX/VG | eBay
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Seiko Speedmaster 7A38-7280 All Gold | WatchUSeek Watch Forums
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Seiko 7a28, 7a38 battery change day ....... | The Watch Site
w713] SEIKO 7A38-7030 CHRONOGRAPH All original Quartz New battery EX | eBay