Unboxing and Review Seiko Prospex SPB101J1 Black Sumo Baselword 2019 (With English Subtitle) - YouTube
WTS] Seiko Sumo SPB101 - 3rd Gen : r/Watchexchange
Introducing: The Seiko Prospex 'Sumo' SPB101 And SPB103 – HODINKEE Shop
Seiko - Seiko Prospex diver's watch known to many as the 'Sumo'. This watch has long been a Seiko favorite and it is now updated with a longer power reserve (70 hours)