The Seiko 5 Sports Field Series SRPJ85K Unisex Watch is a timeless expression of Seiko’s rich heritage in crafting reliable, robust mechanical timepieces. Part of the highly regarded Seiko 5 Sports Field collection, this model draws direct inspiration from classic military “trench watches”, originally designed for use in demanding field conditions where strength, clarity, and reliability were essential. These practical design principles have been carried through to the modern SRPJ85K, reflecting the core Seiko 5 Sports philosophy that has defined the collection for more than five decades.

Designed for everyday versatility, the SRPJ85K features a highly legible black dial with bold markers and LumiBrite‑coated hands and indexes, delivering exceptional visibility in low‑light conditions. The 36.4mm stainless steel case offers balanced proportions that feel both traditional and contemporary, while the curved Hardlex crystal provides Seiko’s signature resistance to impact and wear. Completing the field‑watch aesthetic is a durable nylon strap with pin buckle, offering lightweight comfort and reinforcing the watch’s utilitarian, military‑inspired character.

Powering the watch is the trusted Seiko Calibre 4R36 automatic movement, delivering a dependable 41‑hour power reserve along with day‑date display and stop‑seconds functionality for precise time setting. With 10‑bar water resistance and a see‑through case back that showcases Seiko’s mechanical craftsmanship, the SRPJ85K proudly upholds the five defining principles of Seiko 5 Sports: automatic movement, day‑date display, water resistance, recessed crown, and durable case construction. These features embody Seiko’s longstanding commitment to performance, value, and long‑term reliability.

What we love about the Seiko 5 Sports Field SRPJ85K is its honest, purposeful design and wearable versatility. The combination of classic field‑watch styling, lightweight nylon strap, and proven Seiko automatic movement makes it a timepiece you can rely on every day. Rugged, functional, and unmistakably Seiko, it’s a watch that stays true to its military roots while fitting seamlessly into modern life.

Orders are dispatched within 1–3 business days from Sydney via Australia Post Express for fast and reliable delivery. Customers located in Sydney may also enjoy the convenience of same‑day Click & Collect, with orders ready for pickup from our Alexandria showroom just one hour after purchase when this option is selected at checkout.

Every watch is covered by a 3‑year Seiko Australia warranty, providing complete peace of mind. StarBuy is an Authorised Seiko Distributor, and all watches are supplied in genuine Seiko original packaging. Warranties are registered online directly with Seiko, and following dispatch, Seiko will email you confirmation of your warranty registration along with a link to the online instruction manual. In line with Seiko’s current sustainability practices, printed warranty booklets and manuals are no longer supplied.