Seiko Quartz Diver 7548-7000. Serial number 932711 → Manufactured March 1979 The original band has deteriorated, so I removed it, but I still have it in storage. I will include it if you need it. Replaced with a new rubber belt. Date and day display also work normally. The 7548 series is popular overseas and is a model that will continue to increase in collection value. Vintage diver enthusiasts, please take a look.