Seiko 5 Sports 36.4mm SRPJ85K

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.

• How and when will my StarBuy order be shipped?
  We ship all orders via Australia Post Express for fast and reliable delivery. We aim to dispatch every order as quickly as possible—typically within 1–3 business days. You'll receive a confirmation email with tracking details as soon as your order ships.
  

• Can StarBuy guarantee delivery dates?
  While Australia Post Express is generally reliable, their delivery dates are estimates only and may vary, especially during busy periods. We appreciate your understanding if your parcel takes a little longer to arrive.
  

• Will I need to sign for my order?
  Yes, a signature is required upon delivery. If no one is home, we recommend using a work address. Australia Post may offer contactless delivery—in those cases, we follow their current safety protocols. Risk and ownership transfer to the recipient upon delivery.
  

• What if I am not home when my order arrives?
  If no one is available to sign, Australia Post will leave a card with details on how to collect your parcel from the closest authorised Australia Post Office. You’ll need to present a photo ID at the post office to pick it up. If you’ve authorised a Safe Drop with Australia Post previously, they’ll follow your existing instructions.
  

• Will I get a Shipping Notification?
  Absolutely! As soon as your order is on its way, you’ll receive an email with tracking details. We kindly ask for your patience—tracking updates may take up to 3 business days after ordering.
  

• What are your shipping charges?
  We offer free shipping Australia-wide with Australia Post Express. For approved brands shipped to New Zealand, a $10 flat fee will be added to your total at checkout. Approved parcels to NZ are shipped within the Australia Post / NZ Post network.
  

• Click & Collect?
  

  Prefer a quicker pick-up? Our Click & Collect service makes it easy.

  Pickup Location:
  StarBuy
  Suite 23, 112 McEvoy Street
  Alexandria NSW 2015 

  Hours:
  Monday–Friday: 10am–5pm
  Saturday: 9am–12pm  

  How it works - Your order will be ready for pickup within an hour during business hours (unless otherwise notified). If someone else is collecting on your behalf, just email us their name—they’ll need to show ID at pickup.

• Are all items in stock?

  StarBuy products for sale on the website are always live and accurate. All items marked ‘In Stock’ are physically in stock with us. Items marked ‘Out of Stock’ are completely sold out. In rare instances where additional items are ordered and the items are being shipped to StarBuy, a specific note will be made on the product page.
  
  

• How can I be sure your products are authentic?

  We guarantee that all of the products we sell on StarBuy

  1. Are brand new
  2. Are 100% genuine - manufactured by the named brands, in keeping with their high quality standards.

  The only thing that’s different are the low prices.
  
  

• Is a tax invoice included with my order?

  All orders have an automated invoice emailed to the email address on the order. All items listed on our website are GST inclusive. The invoice clearly shows the GST charged on the purchase as well as our name and ABN number.
  
  

• Can an item be reserved or put on hold?

  Unfortunately due to the model adopted by StarBuy, we are unable to reserve or put an item on hold. Items on sale are limited in quantity and often sell out quickly.
  
  

• Why are StarBuy prices low?

  StarBuy is a low cost discount website that buys items in bulk and offers them at the lowest possible prices. We keep our costs low by automating most back office processes to keep our prices world competitive. We ensure that you benefit by buying quality brands at low prices from StarBuy and come back to save money again and again.