Prospex Professional 300M Tuna Ref. SBBN049 - The Watches Hub
Seiko Prospex Professional Quartz 300m Tuna S23629J1 - YouTube
Seiko Tuna Marinemaster 300m SBBN031 ( Full set / complete servicing by thong sia / new parts replaced ( shroud + crystal ) / 1 year warranty ) | WatchCharts Marketplace
JaWatch Retro | -🚨 #NWA 🚨 1979 Tuna 300m. It's not everyday you find a vintage seiko with box and paper in good condition. Today is my lucky day ... | Instagram
SEIKO MarineMaster Professional 300M SEIKO "Tuna" Quartz Diver with a 48mm Case #SBBN017
FS - SOLD July '81 Seiko 7549-7010 'Tuna' 300m | The Watch Site
Seiko "Franken" TUNA MARINEMASTER PROFESSIONAL 300m Scuba Diver | eBay