Introduction This Seiko 6458-600B Diver Quartz is a compact and highly collectible vintage diver from Seiko’s golden era of tool watches. Featuring a screw-down crown at 4 o’clock, 150m water resistance, and a classic diver aesthetic, it remains a favorite among enthusiasts seeking a smaller-sized dive watch with true Seiko heritage. Historical & Collector Value Produced during the 1980s, the Seiko 6458 series was part of Seiko’s professional-grade quartz diver lineup. These models offered impressive reliability, ISO-style diver features, and rugged construction in a reduced case size—making them rare compared with the more common 6309 and 7002 models. The 6458-600B in particular is sought after for its compact dimensions, clean dial layout, and its status as an authentic vintage Seiko diver that remains wearable and practical today. Specifications • Brand: Seiko • Model: Diver Quartz • Reference: 6458-600B • Movement: Quartz (battery powered) • Case Material: Stainless steel • Bracelet Material: Stainless steel mesh strap (aftermarket) • Case Size: 36.9 mm (caliper measurement) • Dial: White with luminous circular markers • Bezel: Black unidirectional diver bezel • Crown Position: 4 o’clock • Water Resistance: 150 m (as indicated on dial) • Functions: • Hours, minutes, seconds • Day-date (English + Kanji) • Accessories: Watch only (no box or papers shown) Condition This vintage watch shows clear signs of wear consistent with age: • Bezel insert exhibits heavy wear and spotting • Case has scratches and marks throughout • Lume is aged but intact • Mesh bracelet is in good condition (likely non-original) The watch has been operation-checked, and timekeeping, date/day switching, and hands movement work properly. Service History Movement operation has been tested. Battery replacement recommended periodically (battery type: SR1130SW as noted on case back). Shipping & Customs The watch will be carefully packed and shipped with international tracking. Import duties and taxes are the responsibility of the buyer.