Seiko Prospex King Sumo ‘Graduation’ Automatic Blue Dial Steel Bracelet Mens Watch SPB321J1
£1,070.00
* This item is excluded from current promotions.
In stock
Avoid Grey Market Sellers
Best Price Promise
Returns Policy
Description
Seiko Propsex King ‘Sumo’ Automatic Blue Dial Stainless Steel Bracelet Men’s Watch SPB321J1
This watch shape is affectionately named ‘Sumo’ by Seiko fans because of its size and shape and the 12 o’clock marker – it’s a substantially strong looking timepiece.
This latest design has been updated with new modern features, including a ceramic bezel and super hard coating on the case and bracelet for durability. A new 3 row bracelet has been specifically made for this model, while the clasp has also been modernised.
The dial features a fine pressed pattern dial with gradations of blue.
Prospex is a combination of the words ‘Professional’ and ‘Specifications.’ Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike.
Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
The Case:
The Seiko Prospex ‘Sumo’ SPB321J1 is housed in a large case that measures 45mm in diameter and 12.9mm in height. The bulky proportions of the case are one theory suggested to explain the watch’s ‘Sumo’ moniker. One update to the SPB321 is that it is crafted out of stainless steel with Super-Hard coating, which improves the durability of the case. A further update is that the unidirectional rotating dark blue bezel insert is now made out of ceramic, as opposed to aluminum, which improves the longevity and resilience of the watch. It exhibits a 60-minute diving scale and a luminescent pip at the 60-minute mark. The case retains its twisted lugs with alternating polished bevels and brushed lines. The screw-down crown maintains its 4 o’clock position, whilst it also features a sapphire crystal like the previous generation of ‘Sumo’ did.
The Dial:
Further developments to the ‘Sumo’ SPB321J1 are also present through the design of the dial, as it showcases a blue gradient effect which has a fine horizontal wave pattern. The dial does feature Sumo’s iconic markers and hands. The 12 o’clock marker features a unique marking which Seiko-fanatics have suggested bears a resemblance to the ‘Mawashi’ (the underwear worn by a Sumo during a match). The markers and hands are coated with Lumibrite, ensuring that the dial remains readable in the dark. A date-display window is located beside the 3 o’clock marker.
The Bracelet:
The 3-link bracelet has also been redesigned, it is also made of stainless steel with a Super-Hard coating that has been treated to a fully brushed finish. It now features a fold over clasp with a secure lock, push-button release and wetsuit extension.
The Functions:
The Seiko ‘Sumo’ SPB321J1 is powered by Seiko’s 6R35 automatic movement, which has a 70-hour power reserve and has an accuracy of -15/+25 seconds per day. It is water resistant to 200 metres, which means that it can be worn when diving.
If you have any questions please click here
Additional information
gtin | 4.95E+12 |
---|---|
Brand | Seiko |
Face Colour | Blue |
Department | mens |
Manufacturer | Seiko |
MPN | SPB321J1 |
EAN | 4.95E+12 |
SKU | SPB321J1 |
Strap Colour | Silver |
RRP | £1,070.00 |
Guarantee | 2 Year Manufacturer's Guarantee |
Family | Prospex |
Gender | Mens |
Case Size | 45mm |
Strap Type | Engineer Bracelet |
Water Resistency | 200m |
Movement | Automatic (Self-Wind & Manual Wind) |
Glass | Sapphire Crystal |
Clasp Type | Push Button Deployant Clasp |
Watch Style | Diver (200m+) |
Case Material | Stainless Steel |
Case Finish | Brushed |
Caseback Style | Embossed |
Caseback Fastening | Screw-Down |
Crown Type | Screw-Down Crown |
Dial Style | Plain |
Display Type | Analogue |
Day Display | Day |
Markers | Applied |
Luminous Material | Lumibrite |
Luminous Locations | Hands, Markers, Bezel |
Power Reserve/Battery Life | 70 Hours |
Bezel Material | Ceramic |
Bezel Action | 120-Click Unidirectional |
Maximum Bracelet/Strap Length | 20cm |
Case Height | 14mm |
Caliber/Module | 6R35 |
Hacking | Yes |
Strap Material | Stainless Steel |
Woocategory1 | Watches |
Woocategory2 | Seiko Watches |
Woocategory3 | Seiko Prospex Watches |
Woocategory4 | Mens Watches |
Free Strap Adjustment
It's important that your watch fits your wrist comfortably and looks great at the same time.
Leather strap watches tend to fit without a problem for most wearers. However, watches fitted with metal bracelets often need adjusting to get the perfect fit.
This is generally a very simple procedure. We can do this for you, or you can get the watch adjusted locally.
Option 1. Specify your wrist measurement and we will adjust it before being sent
When purchasing a watch which has a metal bracelet with adjustable links, we will gladly adjust the watch bracelet to fit your wrist before sending the watch to you - free of charge!
Simply type your wrist measurement (in inches or centimetres) into the bracelet size section of the checkout and we will ensure the watch bracelet is adjusted accordingly before being sent to you. We will include all the surplus links, with the watch.
How to measure your wrist
You can measure your wrist with a piece of string which you can measure against a ruler:

You should allow about half a centimetre (1/4 inch) of slack to prevent it being too tight on your wrist.
In the event of you needing an extra-long wrist bracelet, which requires an extension to the original watch, we must obtain extra links from the manufacturer, and in this event, we will contact you to inform you of any possible delays or applicable charges.
Watches with bracelets adjusted by WatchNation are still eligible under our refund policy.
Option 2. Buy the watch online from WatchNation and have it adjusted locally
If you wish, you can have it adjusted locally by another jeweller or key cutter. However, you will have to cover the cost of this option yourself.
Delivery Information
Delivery | Time | Cost | |
---|---|---|---|
Royal Mail 48 Hours (Tracked) | 48 hours | FREE | |
Royal Mail 24 Hours (Tracked & Signed) | 24 hours | £4.99 (FREE for orders over £60) |
|
Special Delivery | Next day before 1pm | £6 | |
Special Delivery | Next day before 9am | £12.95 |
All orders are sent using Royal Mail’s tracked delivery service. Orders placed before 4pm (Monday-Friday) are dispatched the same day, 11am Saturday. Sunday orders are dispatched on the following Monday.
*Covid-19 Update: Royal Mail deliveries may be subject to delay relative to timescales below. We would therefore advise selecting DHL express at checkout. Read More.
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £25 | Orders over £500 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £25 | Orders over £500 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 3 days | £25 | Orders over £500 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £25 | Orders over £500 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £30 | Orders over £600 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £30 | Orders over £600 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 5-7 days | £10 | Orders over £150 | |
Express (Tracked) | 2 days | £30 | Orders over £600 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £150 | |
Express (Tracked) | Next day | £20 | Orders over £400 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £150 | |
Express (Tracked) | Next day | £20 | Orders over £400 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £20 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |
Delivery | Time | Cost | Free | |
---|---|---|---|---|
Standard (Tracked) | 2-5 days | £10 | Orders over £120 | |
Express (Tracked) | Next day | £15 | Orders over £300 |