Description
The Seiko SUR311P1 (also referenced as SUR311) is a sleek, versatile Japanese quartz dress-casual timepiece from Seiko’s popular Discover More Essentials Collection. Recognized among horology purists, everyday watch enthusiasts, and collectors by its popular series nicknames—the "Essentials", "Classic Quartz", "Black Sapphire", or "Everyday Sapphire"—this 40.2mm watch offers a masterclass in minimalist design and practical endurance. It pairs a solid stainless steel case with a radiant sunray black dial, applied silver-tone baton indices, faceted dauphine hands filled with LumiBrite, a framed date calendar window at 3 o'clock, an in-house Japanese quartz movement, a scratch-resistant sapphire crystal, a 100-meter water resistance rating, and a solid stainless steel construction. Perfectly calibrated for gentlemen seeking an ultra-reliable, sophisticated everyday watch that transitions effortlessly from formal business attire to casual weekend wear. The defining visual highlight of this SUR311P1 reference is its deep, light-catching sunray black dial face. Under changing light, the dial shifts between an inky jet black and an alluring dark charcoal tone, accented by high-polished silver-tone hour markers and matching faceted hands that ensure instant legibility. For low-light visibility, the hands and index perimeters are treated with Seiko’s proprietary LumiBrite compound. A neatly framed date calendar window rests at 3 o'clock, maintaining clean dial symmetry. Protected by a premium flat scratch-resistant sapphire crystal, the harmonic contrast between the deep black dial, mirror-polished bezel, brushed case shoulders, and solid stainless steel casing delivers a sharp, refined, and confident wrist presence. Beneath its refined exterior, the watch is powered by Seiko’s dedicated in-house Caliber 6N52 quartz movement. Engineered for dependable daily accuracy, this electronic movement operates with a standard rating of ±15 seconds per month. Powered by a silver oxide battery providing an approximate 3-year battery life, the Caliber 6N52 drives central three-hand timekeeping (hours, minutes, sweep seconds) alongside a quickset date calendar at 3 o'clock, offering instant "grab-and-go" convenience without the need to wind or adjust time after periods away from the wrist. The case is engineered with versatile contemporary proportions, measuring 40.2mm in diameter with an ultra-slim profile thickness of just 8.4mm, an ergonomic lug-to-lug distance of 47.0mm, and a standard 20mm lug width, ensuring a balanced, flush, and exceptionally comfortable fit on the wrist. Unlike many everyday watches in this price category that feature standard mineral glass, the SUR311P1 comes standard with a premium scratch-resistant sapphire crystal. Engineered for daily durability, the solid stainless steel case features a solid screw caseback that helps secure a certified 100-meter (10 bar / 10 ATM / 330 ft) water resistance rating, making it completely suitable for daily hand washing, swimming, and light aquatic sports. The timepiece comes completed on an integrated multi-link solid stainless steel construction, secured by a solid three-fold deployment clasp with a dual push-button release.
