The Prospex SPB143 serves as a modern re-interpretation of the reference 6217-8000 "62MAS," Seiko's inaugural professional diver from 1965. While previous tributes were often limited editions or dimensionally altered, this reference successfully translates the original skin-diver silhouette into a contemporary 40.5mm stainless steel case. The chassis is treated with Seiko’s proprietary DiaShield super-hard coating and houses the caliber 6R35, which upgraded the series with a substantial 70-hour power reserve.
Established in 1881 by Kintarō Hattori, Seiko is defined by its principle of complete vertical integration, manufacturing every single component of its timepieces in-house. They were the primary catalyst of the "Quartz Crisis" with the commercial release of the 1969 Astron—the world’s first quartz watch—the brand simultaneously advanced mechanical horology, developing one of the first automatic chronographs and pioneering high-frequency movements to challenge Swiss standards.
Seiko's relentless innovation continues with proprietary technologies like Spring Drive, which blends mechanical power with quartz precision. This technical mastery underpins Seiko's legacy in creating archetypal and exceptionally durable tool watches, particularly in the domain of professional diving.
Overall Grade: 8 / 10 | Great Condition, Light Visible Wear Production: est. 2021 Contents: Full-set Genre: Dive Watch
Size: 40.5mm Thickness: 13.2mm Lug Width: 20mm
Case: Stainless steel case, brushed finish with mirrored bevels, light visible wear Bezel: Stainless steel, unidirectional bezel, black dive insert, light visible wear Dial: Charcoal grey sunburst dial, applied markers Hands: Steel baton hands, lumed
Crown: Stainless steel, light visible wear Crystal: Dome sapphire crystal, light visible wear Bracelet: Stainless steel bracelet, light visible wear Caseback: Solid stainless steel, screw-down caseback, light visible wear Movement: Automatic Caliber: 6R35