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Seiko Sumo

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Seiko Prospex Steel 45mm Blue No numerals The Philippines, Manila
TOP
Seiko JDM JAPAN MADE Blumo Blue Sumo Diver's Watch SBDC033
Php 27,758
Verified Dealer
78
PH
Seiko Prospex Steel 52,6mm Black No numerals
Seiko SBDC031 black SUMO Prospex 200M Diver
Php 25,980
Free shipping
Verified Dealer
153
JP
Seiko Prospex Steel 45mm
Seiko SBDC027 "Sumo" 50th Anniversary (RARE & LIMITED)
Php 100,940
Verified Dealer
12
US
Seiko Prospex Steel 44mm Blue No numerals
Seiko Prospex SUMO
Php 36,991
Verified Dealer
1590
ES
Seiko Prospex Steel Black No numerals
Seiko Prospex limited edition black sumo
Php 48,373
Private Seller
 
DE
Seiko Prospex Steel
Seiko Prospex SBDC081 SBP103 Diver 200m 3rd SUMO
Php 34,718
Verified Dealer
847
JP
Seiko Prospex Steel 45mm Green No numerals
Seiko Prospex SPB103J1 - Sumo - Hulk
Php 38,158
Verified Dealer
226
PL
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex Sumo SPB101J1 Cal 6R35 - Sapphire 70 Hours PR.
Php 38,699
Verified Dealer
114
ES
Seiko Prospex Steel 52.6mm Blue No numerals
Seiko July Promotion Sale Seiko PROSPEX 2020 Japan Exclusive...
Php 42,574
Verified Dealer
50
HK
Seiko Prospex Steel 45mm Black No numerals The Philippines, Manila
Seiko Prospex Limited Edition Black Series Sumo Mens Watch...
Php 45,372
Verified Dealer
78
PH
Seiko Steel 45mm Black No numerals
Seiko SBDC095 Black SUMO Limited Edition
Php 54,321
Free shipping
Verified Dealer
153
JP
Seiko Prospex Steel 45mm Black
Seiko Prospex Automatic Air Diver Rare Limited Edition 2015 5531
Php 96,690
Verified Dealer
4608
IT
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex "Sumo"
Php 43,536
Verified Dealer
1590
ES
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex SUMO
Php 34,067
Private Seller
 
US
Seiko Prospex Steel 45mm Green No numerals
Seiko Prospex Diver Sumo Green - HULK - Automatic - SPB103J1
Php 38,642
Verified Dealer
34
IT
Seiko Prospex Steel 45mm Green No numerals
Seiko Green Sumo Prospex
Php 33,342
Verified Dealer
196
SG
Seiko Prospex Steel 45mm Green No numerals
Seiko Prospex SBDC081 SPB103 Diver 200m SUMO JAPAN MADE ( NEW )
Php 45,372
Free shipping
Verified Dealer
148
US
Seiko Prospex Steel 52.6mm Grey No numerals
Seiko July Promotion Sale Seiko PROSPEX 2020 Japan Exclusive...
Php 44,801
Verified Dealer
50
HK
Seiko King Steel 44.5mm Silver No numerals The Philippines, Manila
Seiko Ultra RARE LE KING POWER Thai Market Silver Sumo SPB029J
Php 147,322
Verified Dealer
78
PH
Seiko Prospex Steel 45mm Black
Seiko Sumo. SBDC027 bezel, MM300 strap, black date, bevelled...
Php 37,804
Private Seller
 
UK
Seiko Prospex Steel Black
Seiko Prospex
Php 56,910
Private Seller
 
GR
Seiko Prospex Steel 44mm
Seiko Scuba sumo
Php 59,755
Private Seller
 
FR
Seiko Prospex
Seiko Prospex 200M Automatic Green Sumo Sapphire 3rd Gen Ref....
Php 35,444
Private Seller
 
SG
Seiko Prospex Steel 45mm Yellow No numerals
Seiko SBDC017 Yellow SUMO Prospex Limited Edition 750 pcs.
Php 172,411
Free shipping
Verified Dealer
153
JP
Seiko Prospex
Seiko Prospex 200M Automatic Black Sumo Sapphire 3rd Gen Ref....
Php 34,248
Private Seller
 
SG
Seiko Steel 45mm Black No numerals
Seiko sumo
Php 33,008
Private Seller
 
IT
Seiko Prospex Steel 45mm Blue
Seiko Prospex Automatic Diver 200M 45mm SBDC033J I
Php 34,089
Verified Dealer
4608
IT
Seiko Prospex Steel Blue
Seiko PROSPEX Japan Exclusive "HULK SUMO" SZSC004
Php 36,335
Verified Dealer
50
HK
Seiko Prospex Blue
Seiko Prospex Diver Scuba SBDC033 - SBDC033
Php 27,957
Verified Dealer
843
JP
Seiko Prospex Steel Green No numerals
Seiko Prospex Prospex SZSC004 Green SUMO 200m Diver
Php 45,372
Free shipping
Verified Dealer
148
US
Seiko Prospex
Seiko prospex SBDC057 professional Spex mechanical watch
Php 21,261
Verified Dealer
847
JP
Seiko Prospex Steel 45mm Green
Seiko Prospex Green Sumo "HULK" SPB103J1
Php 36,991
Verified Dealer
 
DE
Seiko Prospex Steel 52,6mm Blue No numerals
Seiko SBDC057 Prospex PEPSI
Php 25,980
Free shipping
Verified Dealer
153
JP
Seiko Prospex Steel 45mm Blue
Seiko Prospex Sumo
Php 22,764
Private Seller
IT
Seiko Prospex Steel 45mm Green No numerals
Seiko Prospex SPB103J1 Automatic Green 'New Sumo' Diver
Php 34,943
Free shipping
Verified Dealer
1348
NL
Seiko Prospex Steel 45mm
Seiko Black Sumo Prospex
Php 35,335
Verified Dealer
196
SG
Seiko Prospex Steel 52.6mm Blue No numerals
Seiko PROSPEX Japan Exclusive BLUE CAROL SUMO DIVER SBDC069
Php 32,428
Verified Dealer
50
HK
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex Sumo Black - Limited Edition 2020 - New -
Php 42,682
Verified Dealer
34
IT
Seiko Prospex
Seiko NEW SUMO PROSPEX SBDC083 SPB101 DIVER 200M JAPAN MADE (NEW)
Php 40,325
Free shipping
Verified Dealer
148
US
Seiko Prospex Steel Blue
Seiko Prospex SBDC069 Blue Coral SUMO 200m Diver
Php 29,532
Verified Dealer
847
JP
Seiko Prospex Steel 44,5mm Blue No numerals
Seiko Prospex Diver's Sumo Crono Solar
Php 30,731
Verified Dealer
335
ES
Seiko Prospex Steel 52,6mm Blue
Seiko SBDC033 blue SUMO Prospex 200M Diver
Php 23,618
Free shipping
Verified Dealer
153
JP
Seiko Prospex Steel 45mm Black
Seiko Prospex Diver's Sumo Automatico
Php 42,284
Verified Dealer
 
ES
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex SPB101J1 Automatic Black 'New Sumo' Diver
Php 33,861
Free shipping
Verified Dealer
1348
NL
Seiko Prospex Steel Blue
Seiko Prospex
Php 27,543
Verified Dealer
196
SG
Seiko Prospex Steel 52.6mm Blue No numerals
Seiko PROSPEX 2020 Japan Exclusive "DEEP BLUE SUMO" SBDC099
Php 48,057
Verified Dealer
50
HK
Seiko Prospex Steel
Seiko Prospex JDM Sumo Green SZSC004 (New, Extremely Rare)
Php 42,546
Verified Dealer
94
JP
Seiko Prospex Steel 45,00mm Blue No numerals
Seiko Prospex Sumo Blue Coral Sumo SBDC069
Php 41,544
Verified Dealer
451
PL
Seiko Prospex Steel Green No numerals
Seiko Prospex SZSC004 Green SUMO 200m Diver
Php 30,940
Verified Dealer
847
JP
Seiko Prospex Steel 45mm Black No numerals
Seiko Prospex Sumo SPB101J1
Php 35,488
Free shipping
Verified Dealer
 
MY
Seiko Prospex Steel 53mm Green No numerals
Seiko SZSC004 Green Emerald SUMO Prospex Special Edition
Php 36,372
Free shipping
Verified Dealer
153
JP
Seiko Prospex Steel 45mm Black
Seiko Prospex Automatik "Sumo" SPB125J1 Black Series Limited...
Php 48,373
Verified Dealer
137
AT
Seiko Prospex Steel 44,5mm Black Arabic numerals
Seiko Prospex SSC757J1 Sumo Chronograph 200M Steel
Php 29,878
Free shipping
Verified Dealer
1348
NL
Seiko Prospex Blue
Seiko Prospex Diver Scuba SBDC033 - SBDC033
Php 28,213
Free shipping
Verified Dealer
2621
US
Seiko Prospex Steel 52.6mm Black No numerals
Seiko PROSPEX 2019 "NEW SUMO" Automatic Watch SPB101J1 BLACK
Php 37,768
Verified Dealer
50
HK
Seiko Prospex Steel
Seiko Prospex PADI Collaboration SBDC049 (NEW, 1,000 Limited)
Php 65,459
Verified Dealer
94
JP
Seiko Prospex Steel 45mm Black No numerals
Seiko Sumo SBDC031J1
Php 35,341
Verified Dealer
451
PL
Seiko Prospex Steel
Seiko Prospex Sumo Scuba Gray Japan Limited SBDC097 Watch
Php 44,166
Verified Dealer
847
JP
Seiko Prospex Steel 45mm Green No numerals
Seiko Sumo Prospex Green Dial
Php 38,180
Verified Dealer
33
AU
Seiko Prospex Steel 53mm Blue No numerals
Seiko SBDC069 SUMO Blue Coral Reef Prospex Special Edition
Php 28,578
Free shipping
Verified Dealer
153
JP
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Seiko Sumo: The Affordable Diving Watch for Pros

The Sumo is one of the most coveted and affordable diving watches made by Japanese manufacturer Seiko. This watch boasts high-quality workmanship, water resistance to 200 m, and a robust, automatic in-house movement.


Highlights

  • Professional diving watch
  • In-house movement 6R15 with a 50-hour power reserve
  • Waterproof to 200 m (20 bar)
  • Seiko Sumo with 45-mm diameter

Seiko Sumo – An Iconic Diving Watch

The Seiko Sumo is known among watch enthusiasts as a popular, high-quality, and nonetheless affordable diving watch. As its name suggests, this wristwatch is relatively large. The 45-mm case is indeed rather sizable, but overall the watch doesn't come across as particularly bulky as it is only 13 mm thick. The unidirectional bezel, useful for keeping track of dive time, is set into the case, which contributes to the watch's relative slimness. In addition to its size, the position of the crown at 4 o'clock is another distinguishing feature of the Seiko Sumo .

Within the Prospex collection – the collection name stems from "Professional Specifications" – the Seiko Sumo falls in the middle range of prices. It is a bit more expensive than the Turtle, but considerably less expensive than the Marinemaster. To the untrained eye, the Sumo differs only slightly from the Marinemaster 300. Thus it presents an affordable alternative to the more pricey professional diving watch.


How much does a Seiko Sumo cost?

Reference number Price (approx.) Limited run
SBDC049 1,000 euros 1,000 pieces
SBDC027 1,000 euros 2,000 pieces
SBDC001 600 euros
SBDC031 450 euros
SBDC033 450 euros

Detailed Price Information

Prices for the Seiko Sumo start around 450 euros for standard models with reference numbers SBDC031 and SBDC033. The Seiko PADI Ref. SBDC049 is limited to 1,000 pieces and is considerably more expensive at around 1,000 euros. In celebration of the 50th anniversary of its diving watches, Seiko released several other limited editions in 2015. Among these is the Sumo model with reference number SBDC027, which was limited to 2,000 pieces.

The 50th Anniversary Model of the Sumo was fitted with some upgrades, raising the quality above that of the standard models. For example, scratch-resistant sapphire glass gives wearers a clear look at the display in the upgraded model, whereas Seiko's Hardlexglas shields the display in the standard models. Additionally, the case of the SBDC027 is protected from small scratches by a Dia Shield coating . The design of the bezel is more reminiscent of the higher-end Marinemaster 300 than the other Sumo models. The shape of the hands and hour markers also differs. The Anniversary Model has indices instead of the large dots that typically mark the hours on Sumo models, and slimmer, rod-shaped hands replace the sword hands of the standard variants. The list price of the Sumo SBDC027 was around 1,000 euros at the time of its release in 2015. However, due to its limited run, this model is rather difficult to come by.


Design and Workmanship of the Seiko Sumo

The case of the Seiko Sumo is finished to a high standard and can easily hold its own among Swiss luxury watches. It is superbly polished and satin brushed. Even the in-house movement 6R15 is lightly finished, despite being hidden behind a large, screw-down case back. Thanks to this case back and the screw-down crown, the case is water resistant to 200 m (20 bar). The fluted crown is easy to use, as is the unidirectional diving bezel, which can only be turned counterclockwise for safety reasons.

The standard models SBDC031 and SBDC033 feature either black or blue dials and bezel inlays. The brand inscription is located under the 12 o'clock position, and over 6 o'clock there is a large X signifying the Prospex collection. Beneath the X, the words "Automatic" and "Diver's 200m" are written. The date display is situated at 3 o'clock. The three hands, the hour markers, and the zero marker of the rotating bezel are all coated with glowing LumiBrite luminescent material . Lumibrite ensures that the time can be read easily in the dark or underwater and is said to glow longer and more brightly than other comparable materials.

The lug for the bracelet is 20 mm wide and thus appears rather slim on this large diving watch. The stainless steel bracelet is well made and has a fold-over buckle with a security clasp and brackets. However, the bracelet is still not quite up to the overall high standard of workmanship of the Seiko Sumo. Luckily it can easily be replaced with a NATO or silicon strap, for example. The latter cost around 50 euros.

Features of the Seiko Sumo

  • Case and bracelet made of stainless steel
  • 45-mm diameter, 13-mm thickness
  • Polished and satin-brushed case
  • Screw-down case back and crown
  • Scratch-resistant Hardlex glass
  • Bright LumiBrite luminescent material
  • Models in black or blue

Equipped with an In-House Movement

The Japanese in-house movement 6R15 ticks away inside of the Seiko Sumo. It consists of 168 individual parts and 23 jewels. The power reserve lasts 50 hours and thus surpasses the frequently-used Swiss ETA caliber 2824 by 10 hours. The 6R15 has a date display, can be wound by hand, and has a stop-seconds mechanism allowing the time to be set to the exact second. The deviation is a generous -15 to +25 seconds a day according to Seiko, meaning that it does not run as accurately as Swiss chronometers, which typically have an average daily deviation of -4 to +6 seconds. On the wrist, however, many Seiko watches are very precise and deviate only a few seconds a day.