Movement
- Type Automatic
Watch
- Reference SPB103J
- Display Analog
- Gender Male
- Age Group Adults
Brand
- Brand Seiko
- Warranty Period Seiko 3 Year
- Packaging Seiko Official Packaging
Seiko Prospex Sumo 45mm SPB103J
4 interest free payments of $242.50
Items in stock at Starbuy Showroom Alexandria
Click & Collect in 1 Hour
Authorized Dealer
45 days return
Free Express Shipping
The Seiko Prospex Sumo SPB103J—proudly Made in Japan—is a bold and iconic diver’s watch beloved by Seiko fans around the world. Nicknamed the “Sumo” for its powerful case shape, broad stance, and distinctive 12 o’clock marker, this model embodies strength, durability, and unmistakable Seiko character.
The vibrant green dial of the Seiko SPB103J is paired with large LumiBrite hands and markers for exceptional underwater visibility, while the robust stainless‑steel case and bracelet deliver reliability in demanding conditions.
Powered by Seiko’s high‑performance 6R35 automatic movement, the SPB103J offers an impressive 70‑hour power reserve and the precision engineering Seiko is renowned for. With a sapphire crystal, screw‑down crown, unidirectional rotating bezel, and 200m water resistance, this Prospex diver carries forward Seiko’s heritage of pioneering dive‑watch craftsmanship since the debut of Japan’s first diver’s watch in 1965.
What we love about the Seiko Sumo SPB103J. The SPB103J captures everything that makes the Sumo a fan favourite—rugged presence, exceptional build quality, and brilliant legibility. The green dial adds a modern twist to a true Seiko classic, while the 6R35 movement provides dependable, long‑lasting performance. It’s a standout diver that blends heritage, precision, and everyday wearability in one unmistakable design.
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.
Specification
Case
- Case Diameter (mm) 45mm
- Case Thickness (mm) 12.9mm
- Lug-to-Lug (mm) 52.6mm
- Case Material Stainless Steel
- Case Shape Round
- Glass Type Sapphire Crystal
Bracelet / Strap
- Material Stainless Steel
- Type Bracelet
- Clasp Type Push Button Deployment Clasp
Dial
- Colour Green
Delivery
-
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 2015Hours:
Monday–Friday: 10am–5pm
Saturday: 9am–12pmHow 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.
FAQ
-
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- Are brand new
- Are 100% genuine - manufactured by the named brands, in keeping with their high quality standards.
-
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.
Seiko Prospex Sumo 45mm SPB103J
Sale price$970.00
Regular price$1,400.00
Choose options
Seiko Prospex Sumo 45mm SPB103J
Sale price$970.00
Regular price$1,400.00
4 interest free payments of $242.50
Request a Price Beat
Please remember to supply a link to where you have seen the item cheaper. Learn more about Price Beat
About the brand
Seiko
Discover the timeless elegance of Seiko watches, renowned for their precision engineering and exquisite craftsmanship blending Japanese precision with unparalleled style. With a legacy spanning over a century, Seiko has consistently set the standard for innovation in horology.
Reviews
Need help?