ドーンとグリーンカラーのダイヤルに「50th」の記載がある「SUMO」。1965-2015のセイコーダイバー誕生50周年を記念してタイ王国限定でリリースされたモデルTidal Wave Patter o Gree DialStailess Steel BraceletSapphire Crystal + Magifyig with ati-reflective coatigUidirectioal Rotatig BezelDouble Lockig Fold-over Push-butto ClaspGold color Screw Dow CrowGold color IdexLimited Productio 820 Pcs. (For Thailad retail oly)Screw Back Case6R15 CaliberAutomatic with Maual Widig CrowDiver’s 200m23 Jewels~50 Hour Power ReserveAccuracy of +25 to -15 Secods per DayWater Resistat to 200mResistat to Magetic IterfereceSecod Had Stop FuctioLumiBrite o Hads ad Markers50 x 48 x 13.3mm Case Size44mm Case Diameter20mm Bad WidthExtra Seiko Polyurethae Rubbers bad (Icluded)Ref # SPB031J1