The Seiko 5 Sports SNXS Series SRPL55K1 marks the modern mechanical rebirth of one of the brand’s most celebrated vintage everyday designs. Rooted in the iconic silhouette of the historic SNXS lineage, this versatile dress-sports timepiece pairs classic mid-century proportions with modern movement engineering. Developed for enthusiasts and urban professionals seeking a compact everyday stainless steel mechanical watch with curved hardlex, the SRPL55K1 delivers refined vintage styling, supreme wrist comfort, and renowned Japanese tool-watch reliability.

Vintage 37.4mm Geometry and Recessed Ergonomics

Forged from premium surgical-grade stainless steel, the watch is engineered with an impeccably proportioned round case measuring 37.4mm in diameter, 12.5mm in thickness, and an ergonomic 44.7mm lug-to-lug span. Weighing an easy-wearing 125 grams, this compact profile contours naturally around the wrist, slipping smoothly beneath tailored shirts, wool knitwear, and casual jackets. The case preserves the iconic SNXS signature recessed crown positioned neatly at 4 o’clock, preventing it from pressing into the back of your hand during active wear. Alternating satin-brushed surfaces and mirror-polished flanks highlight the fluid case architecture, framed by a clean, polished steel bezel.

Deep Black Sunray Dial with Vivid LumiBrite Accents

Protected beneath a vintage-inspired curved Hardlex crystal glass rests a deep black sunray dial that absorbs and disperses light with subtle sophistication. The dial layout is detailed with bold applied baton hour indices and faceted hands, each generously filled with proprietary Seiko LumiBrite luminous compound for instantaneous, high-contrast legibility even in pitch darkness. A polished date-and-day complication sits framed cleanly at 3 o’clock, offering quick, practical calendar tracking for everyday urban life. An understated outer minute track complements the dial, maintaining optimal balance across the face.

Articulated Multi-Link Bracelet and Daily Comfort

Flowing smoothly from the 18mm lugs is an integrated three-link stainless steel bracelet engineered for supple articulation and feather light comfort. The short, contoured links wrap naturally around the wrist, preventing pinching and delivering balanced wearability for the office, travel, or relaxed weekends. It is fastened securely by a dependable three-fold deployment clasp with a dual push-button release, ensuring effortless operation and complete peace of mind on the go.

Battle-Tested In-House Seiko Caliber 4R36 Automatic Movement

Powering the SRPL55K1 is the venerable in-house Seiko Caliber 4R36 automatic movement. Operating at 21,600 vibrations per hour across 24 jewels, this self-winding caliber delivers approximately 41 hours of power reserve. It incorporates manual hand-winding capability, a hacking stop-second function for pinpoint synchronization, and 4,800 A/m magnetic resistance to protect against modern electronic devices. Upgraded with a robust 10 bar (100 meters / 330 feet) water resistance rating, it easily withstands swimming, hand washing, and rain.

Exhibition Case Back and Official Warranty Guarantee

A screw-down see-through exhibition case back reveals the decorated mechanical movement and oscillating rotor in motion. Backed by Seiko’s official international manufacturer warranty, the Seiko 5 Sports SRPL55K1 black dial automatic watch is a timeless, go-anywhere essential for any curated watch collection.