Seiko Prospex Diver SPB143

The Seiko Prospex SPB143 has become one of the most celebrated modern dive watches in Seiko’s catalog, earning a reputation as the definitive contemporary interpretation of the legendary 1965 Seiko 62MAS—the brand’s first dive watch and the foundation of its professional diving legacy. Introduced in 2020, the SPB143 captures the clean, utilitarian spirit of the original while incorporating modern materials, proportions, and engineering. Its 40.5mm stainless steel case, compact 47.6mm lug-to-lug measurement, and restrained 13.2mm thickness create a remarkably wearable profile that appeals to both seasoned collectors and first-time enthusiasts. The watch pairs a sunburst charcoal-gray dial with a brushed steel bezel, producing a subtle and versatile aesthetic that distinguishes it from more aggressive modern dive watches.

Powering the SPB143 is Seiko’s automatic Caliber 6R35, featuring a substantial 70-hour power reserve, hacking seconds, and hand-winding capability. A curved sapphire crystal with anti-reflective coating protects the dial, while Lumibrite-filled hands and markers deliver exceptional low-light legibility. Built as a true professional dive watch, the SPB143 offers 200 meters of water resistance, a screw-down crown, and a unidirectional rotating bezel. Seiko’s proprietary super-hard coating further enhances durability, helping the case and bracelet resist the wear and scratches of daily use. These modern upgrades allow the watch to retain its vintage-inspired appearance while performing to contemporary standards.

What makes the SPB143 especially desirable is its balance. It successfully bridges the gap between vintage charm and modern practicality, offering collectors the heritage of the iconic 62MAS without the compromises often associated with vintage watches. The understated dial, classic proportions, and versatile design allow it to transition effortlessly from the office to the beach, while its historical significance gives it a depth of character rarely found at its price point. Widely regarded as one of the best values in modern dive watches, the SPB143 has become a cornerstone reference within the Prospex collection and a benchmark for enthusiasts seeking an everyday tool watch with genuine historical roots.

Reference: SPB143

Dated: 2025

Bezel Aligns

Strap: Stainless Steel Bracelet

Case: 40.5mm x 13.2 thickness - stainless steel

Lug Width: 20mm

Movement: 6R35 - Automatic

Functions: HMS, Date

Box and Papers: Both

Crystal: Sapphire

Bracelet size: 7.65”

Case has no wear. Bracelet has no wear. Dial, hands, and crystal have no wear.