7123-823F] My dad gave me my first Seiko when I was 18. It's an 80s Sports 100 he used diving. After all these years it's still ticking away with the occasional battery
SOLD 1980 Seiko SQ100 divers watch 7123-823H - Birth Year Watches
Seiko 7123-823B Quartz | The Watch Bloke
Replacing Battery in Seiko Quartz Sports Watch - YouTube