Seiko Prospex Scuba SBDC003 Sumo and SCH057 Sawtooth - The Time Bum
FS: SBDC003 Blumo/Seiko Sumo with extras | WatchUSeek Watch Forums
WTS] The Ultimate Blue-mo! - A Seiko "Sumo" ref. SBDC003 with Sapphire, Ceramic, Automatic 6R Movement, OEM Bracelet, and Full Box and Papers, Just $399 Shipped! : r/Watchexchange