For sale is a Seiko Prospex “Ninja Sumo” Black Series Limited Edition, reference SPB125 / 6R35-00D0, one of only 7,000 pieces produced worldwide. This watch is Limited Edition #4625 / 7000. As is standard for this Seiko limited edition, the limited edition number is engraved on the case back, while the serial number appears on the original warranty card. The warranty card serial 004625 corresponds to the limited edition number, confirming authenticity. Originally purchased on October 15, 2020. The Ninja Sumo is a highly sought-after modern Seiko diver, known for its stealth black hard-coated case, gold LumiBrite accents, and the upgraded 6R35 automatic movement with a 70-hour power reserve. Specifications Model: Seiko Prospex Black Series “Ninja Sumo” Reference: 6R35-00D0 Limited Edition: #4625 / 7000 Movement: Seiko 6R35 automatic (hacking and hand-winding) Power Reserve: Approx. 70 hours Case: Black hard-coated stainless steel Crystal: Sapphire with anti-reflective coating Bezel: Unidirectional dive bezel Dial: Matte black with gold LumiBrite accents Water Resistance: 200m (ISO certified diver) Condition Pre-owned and well cared for Watch is in working condition and running as expected Stored in a watch box with my collection when not being worn Normal signs of careful wear consistent with a pre-owned watch Included Seiko Prospex Ninja Sumo watch Original Seiko black rubber wave-style strap with black accents Original Seiko box Original manual Original warranty card (serial number 004625)