Seiko SRPD91 5 Sport Automatic Day-Date Black Dial Green Nylon Strap

Seiko SRPD91 5 Sports Overview

The Seiko SRPD91 brings the 5 Sports line’s everyday dive-watch character into a tactical green configuration. A black ion-coated stainless steel case, textured black dial, and dark green nylon strap make it a versatile daily-wear automatic for buyers who want SKX styling cues at an accessible price point.

Design & Dial

The textured black dial carries Seiko 5’s signature applied indices and an arrow-tipped hour hand, with LumiBrite-treated hands and markers for low-light legibility. A day-date window sits at 3 o’clock and a black unidirectional bezel with 60-minute markings frames the dial. The crown is offset at 4 o’clock in classic Seiko 5 fashion.

Movement & Performance

Inside is Seiko’s in-house Caliber 4R36 automatic movement with 24 jewels, beating at 21,600 vibrations per hour. It offers approximately 41 hours of power reserve along with manual winding and hacking seconds, giving the wearer reliable everyday timekeeping with the option to set the time precisely.

Case & Build

The 42.5mm stainless steel case features a black hard coating and measures 13.4mm thick with a 46mm lug-to-lug span. A Hardlex mineral crystal protects the dial, and a see-through screw-down exhibition caseback reveals the 4R36 movement. Water resistance is rated to 100 meters (10 bar).

Strap

A dark green nylon strap with black-coated hardware completes the look on a 22mm lug width. The casual nylon construction keeps the watch lightweight and comfortable for daily wear and pairs naturally with the tactical-leaning case finish.

Why WatchSurplus

WatchSurplus focuses on authentic watches with verified product details, competitive pricing, and responsive support. Each listing is built from sourced product information so you can compare model, specs, and value with confidence.