Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Known as 'THE SUMO', this SPB101J watch features a black dial with Lumibrite hands and hour markers as well as a date display and chronograph. Its 45mm case is made out of stainless-steel and has a one-way rotating bezel and screw down crown. Offers up to 200 metres water resistance.
Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Known as 'THE SUMO', this SPB101J watch features a black dial with Lumibrite hands and hour markers as well as a date display and chronograph. Its 45mm case is made out of stainless-steel and has a one-way rotating bezel and screw down crown. Offers up to 200 metres water resistance.
in 3 offers
The lowest price for Seiko Men's Prospex Automatic Divers SPB101J Watch right now is $1,048.95 at eBay.com.au, compared across 3 retailers.
The all-time low was $577.00 on 26 Apr 2026 — today's price is 82% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 23 June 2026.
Seiko Men's Prospex Automatic Divers SPB101J Watch
Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Known as 'THE SUMO', this SPB101J watch features a black dial with Lumibrite hands and hour markers as well as a date display and chronograph. Its 45mm case is made out of stainless-steel and has a one-way rotating bezel and screw down crown. Offers up to 200 metres water resistance.
Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Known as 'THE SUMO', this SPB101J watch features a black dial with Lumibrite hands and hour markers as well as a date display and chronograph. Its 45mm case is made out of stainless-steel and has a one-way rotating bezel and screw down crown. Offers up to 200 metres water resistance.
Last updated at 23/06/2026 10:53:41
Seiko Spb101j1 Automatic Mens Watch Made In Japan + Worldwide Warranty
Free delivery
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Seiko Prospex SPB101J Steel 45mm 2026
Delivery $47
Seiko Prospex SPB101J
originally posted on starbuy.com.au
First time buyer. Very impressive service. I live in Melbourne and during COVID-19 ordered on Tuesday, received delivery in Wednesday, in less than 24 hours! Very impressive.I purchased the Seiko Sumo (black) SPB101J1. The item was received with all books, warranty cards, tags and information all in original packaging.My inspection of the watch, -absolutely flawless!! Not a single mark, scratch, smear, nothing. All the OEM protective plastics intact.100% satisfied with my first time purchase thru Starbuy. Competitive prices, excellent service.Will purchase again!
originally posted on starbuy.com.au
I was drawn to this watch because of the great value it offers in terms of specs with its 6R35 movement which has 70 hour power reserve and sapphire crystal being major upgrades over the previous generation of the Sumo. Its got stunning looks to boot with the polished applied indices and handset catching the light beautifully and giving the dial added depth and detail. As expected of Seiko, the case is finished beautifully.The lug to lug of 52.5mm had initially kept me from buying this watch. However, after the bracelet was sized up it sits well on my 6.5 inch wrist despite its size.As for the service and speed of delivery from Starbuy, I could not be more impressed and I look forward to buy more watches from them.
originally posted on starbuy.com.au
I had a wonderful experience purchasing my first respectable watch. The customer service from Starbuy was great as I opted for click and collect and was able to inspeect the watch before taking it home. Also many more unique watches at the shop that aren't found online. Well worth the visit and time. I look forward to purchasing more in the future.
| Case Material | Stainless |
| Case Width | 45-47mm |
| Metal Colour | Steel and Black |
| Metal content | Stainless Steel |
| Movement | Automatic |
Seiko Spb101j1 Automatic Mens Watch Made In Japan + Worldwide Warranty
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seiko Prospex SPB101J Steel 45mm 2026
Delivery $47
Seiko Prospex SPB101J
First time buyer. Very impressive service. I live in Melbourne and during COVID-19 ordered on Tuesday, received delivery in Wednesday, in less than 24 hours! Very impressive.I purchased the Seiko Sumo (black) SPB101J1. The item was received with all books, warranty cards, tags and information all in original packaging.My inspection of the watch, -absolutely flawless!! Not a single mark, scratch, smear, nothing. All the OEM protective plastics intact.100% satisfied with my first time purchase thru Starbuy. Competitive prices, excellent service.Will purchase again!
I was drawn to this watch because of the great value it offers in terms of specs with its 6R35 movement which has 70 hour power reserve and sapphire crystal being major upgrades over the previous generation of the Sumo. Its got stunning looks to boot with the polished applied indices and handset catching the light beautifully and giving the dial added depth and detail. As expected of Seiko, the case is finished beautifully.The lug to lug of 52.5mm had initially kept me from buying this watch. However, after the bracelet was sized up it sits well on my 6.5 inch wrist despite its size.As for the service and speed of delivery from Starbuy, I could not be more impressed and I look forward to buy more watches from them.
I had a wonderful experience purchasing my first respectable watch. The customer service from Starbuy was great as I opted for click and collect and was able to inspeect the watch before taking it home. Also many more unique watches at the shop that aren't found online. Well worth the visit and time. I look forward to purchasing more in the future.
Really good looking watch. It really hugs the wrist, very comfortable for a large watch. Very well packaged for delivery and delivered in a timely manner. Another great experience with Starbuy.
Excellent service, express delivery, unbeatable price, highly recommended. I also received an ewarranty directly from Seiko which proves Starbuy is an excellent choice and an authorised retailer. I am very pleased with the experience and the watch. The Sumo 3 keeps delivering high quality and precision with a reasonable price. This watch definitely looks high quality with a 20mm bracelet which some may say is too small but I found it to be exactly the opposite if you are thrown off by extra bulky, flashy watches.
I bought the Seiko Prospex Automatic Sumo SPB101J1 about ten days ago and I have been wearing it daily since then with great satisfaction.As I was expecting, being a Seiko long-time lover, the overall quality of this piece is outstanding. The quality-to-price ratio is pretty high and it seems like this Seiko belongs to an upper category.The Sumo case is a piece of art with all its mix of brushed and polished surfaces. The detail of the rotating bezel entering the case is stunning.The new bezel is really well done and the movement is fluid and precise. The sound of the clicks is pretty satisfying.I’m extremely pleased by the quality of the newly introduced sapphire glass, always shiny and clear, so much that it seems to disappear from the view when you look at ... MoreI bought the Seiko Prospex Automatic Sumo SPB101J1 about ten days ago and I have been wearing it daily since then with great satisfaction.As I was expecting, being a Seiko long-time lover, the overall quality of this piece is outstanding. The quality-to-price ratio is pretty high and it seems like this Seiko belongs to an upper category.The Sumo case is a piece of art with all its mix of brushed and polished surfaces. The detail of the rotating bezel entering the case is stunning.The new bezel is really well done and the movement is fluid and precise. The sound of the clicks is pretty satisfying.I’m extremely pleased by the quality of the newly introduced sapphire glass, always shiny and clear, so much that it seems to disappear from the view when you look at the dial under certain angles.The movement is very precise and so far it gained about +2 seconds per day with a regular use. The 70-hour power reserve is excellent as it allows you to give the watch some rest over the weekend and to have it ready on Mondays (but, honestly, this is not going to happen to me as I’m pretty sure I will be wearing this beauty all the time I can).The only downside for me is the pins and collars system for the bracelet links. I fitted the bracelet myself for my wrist and it was quite a battle.My overall rate is 9.5/10.
As usual , I ordered the watch Saturday night and had it in my hand Tuesday afternoon here in Perth ,, the service from StarBuy is the best I have ever had , bar none !The watch ? ,, for the price I payed for it it outshines some of my 2k plus watches , its beautiful and the more you look at it the more details you see , like the lug's ,, look carefully at the amount of workmanship that gone into just these and the watch is full of deatails like this .More than impressed and thank you again StarBuy
My second Seiko from Starbuy. Especially pleased to get a Sumo. The movement and power reserve (70 hrs) is impressive. So far accuracy is great at only +7 sec per day. Watch finish and alignment appears much better on higher quality Sumos. Have had slight issues with lower models such as the Turtle.Cheaper than anywhere else and quickly delivery. Great service.
The Sumo is a stunner and somehow Starbuy has the best price while offering an official Seiko warranty. I don't know how they do it but I'm glad they do otherwise I don't know that I would have bought such a beautiful watch. The Sumo has a uniquely beautiful case. It is engineered like very few cases are. Stunning. The watch is an ISO certified diver and you should know that many many Swiss watches don't have that, even when they boast hefty water resistance they often are not actually ISO certified. The Sumo also has a 70hr power reserve. No, it doesn't have the panache or the brand recognition of a Swiss watch, and its clasp is pressed (but not all presses clasps are the same and this one is in some ways more solid than many milled clasps). You cannot flex with ... MoreThe Sumo is a stunner and somehow Starbuy has the best price while offering an official Seiko warranty. I don't know how they do it but I'm glad they do otherwise I don't know that I would have bought such a beautiful watch. The Sumo has a uniquely beautiful case. It is engineered like very few cases are. Stunning. The watch is an ISO certified diver and you should know that many many Swiss watches don't have that, even when they boast hefty water resistance they often are not actually ISO certified. The Sumo also has a 70hr power reserve. No, it doesn't have the panache or the brand recognition of a Swiss watch, and its clasp is pressed (but not all presses clasps are the same and this one is in some ways more solid than many milled clasps). You cannot flex with this watch because its not Swiss and it lacks those little finishes that luxury timepieces have but, it's still classy and you can wear it without coming across as a wannabe or a try-hard. I think its an awesome watch and trust me, you will not find a better case from an established manufacture for anything less than 3 or 4 times the price - minimum. It's approaching Grand Seiko level. Thanks Starbuy.
The finish on this Sumo makes it look a lot more expensive that what it is.. The movement is okay and is running within it's specs of -15/+25 seconds per day. The power reserve is handy at 70hrs. The pin & collar adjustment annoys me so replace the bracelet with an aftermarket Jubilee with a milled clasp for that additional wow factor.
| Case Material | Stainless |
| Case Width | 45-47mm |
| Metal Colour | Steel and Black |
| Metal content | Stainless Steel |
| Movement | Automatic |
