Seiko5 Sports Suits

Blue dial of a Seiko 5 Sports, close up
Scale drawing of the Seiko 5 Sports Suits: 40 mm diameter, 44.6 mm lug-to-lug and 11.5 mm thick

A scale drawing from the manufacturer’s dimensions; the official photo is pending. Header: a Seiko 5 Sports, close up.

Seiko 5 Sports Suits€275–310
Seiko · Ref. SRPE55K1 · Sports · Japan

Indicative price band. The exact price is on Amazon.

See price on Amazon
  • The urban 5 Sports: 40 mm, a fixed bezel and a steel bracelet, with the same 4R36 and 100 m as the dive models.
  • 4R36 movement with 41 h of power reserve at 21,600 bph.
  • Hacking seconds and hand winding.
  • Hardlex crystal and 100 m water resistance.
  • 40 mm diameter, 11.5 mm thick and 44.6 mm lug-to-lug.

Affiliate link: if you buy, Amazon pays Calibrario a commission and you pay the same. Availability on Amazon.es checked on 21 October 2026.

In figures

41 hPower reserve
40mm diameter
11.5mm thick
44.6mm lug-to-lug
100 mWater resistance
HardlexCrystal

Will it fit your wrist?

Move the slider to your wrist circumference. Seen from above, your wrist is roughly a third of that wide; if the lug-to-lug is wider, the watch overhangs.

Scale drawing of the Seiko 5 Sports Suits: 40 mm diameter, 44.6 mm lug-to-lug and 11.5 mm thickØ 40 mm44.6 mm lug-to-lug11.5 mm

With a 17 cm circumference, your wrist is about 56 mm wide.

5 Sports Suits40 mmTsuyosa40 mm5 Sports GMT42.5 mm

Specifications

Movement

Movement4R36
Movement makerSeiko
Power reserve41 h
Beat rate21,600 bph
Hacking secondsYes
Hand windingYes

Case and crystal

Diameter40 mm
Thickness11.5 mm
Lug-to-lug44.6 mm
CaseSteel
CrystalHardlex
Water resistance100 m
Rotating bezelNo
Display casebackYes

Strap and dial

Lug width20 mm
Strap or braceletSteel bracelet
DialBlack
ComplicationsDay and date

Buying

Indicative price band€275–310
StyleSports
Brand originJapan

Data checked against the manufacturer’s official website on 21 October 2026. A dash means the manufacturer does not publish that figure.

Sources: seikowatches.com, seikowatches.com

The movement

Seiko’s workhorse automatic: 24 jewels, 41 hours, hacking seconds and hand winding.

All about the Seiko 4R (4R34, 4R35, 4R36 and 4R38)

Against its rivals

Scale drawing of the Seiko 5 Sports Suits: 40 mm diameter, 44.6 mm lug-to-lug and 11.5 mm thick
Seiko 5 Sports Suits
4R36, 41 h, Hardlex, 100 m, 40 mm
€275–310
Scale drawing of the Citizen Tsuyosa: 40 mm diameter, 45 mm lug-to-lug and 12 mm thick
Citizen Tsuyosa
8210, 40 h, sapphire, 50 m, 40 mm
€240–275
Seiko 5 Sports GMT in its box
Seiko 5 Sports GMT
4R34, 41 h, Hardlex, 100 m, 42.5 mm
€420–470
Figure Seiko 5 Sports SuitsCitizen TsuyosaSeiko 5 Sports GMT
Indicative price band€275–310€240–275€420–470
Movement4R3682104R34
Power reserve41 h40 h41 h
Beat rate21,600 bph21,600 bph21,600 bph
CrystalHardlexSapphireHardlex
Water resistance100 m50 m100 m
Diameter40 mm40 mm42.5 mm
Thickness11.5 mm—13.6 mm
Lug-to-lug44.6 mm—46 mm
Hacking secondsYesYesYes
Hand windingYesYesYes
Rotating bezelNoNoYes
Strap or braceletSteel braceletIntegrated steel braceletSteel bracelet
Brand originJapanJapanJapan
See price on AmazonSee specsSee price on AmazonSee specsSee price on AmazonSee specs

Watches of the same style with the nearest price band. In red, the best figure in each row.

Comparisons

Making sense of the specs

Caseback of an automatic watch showing the rotor Power reserveHow long it keeps running off the wrist, and why 80 hours changes daily life.Read the guide Dial of a Seiko chronograph, close up Sapphire, Hardlex or mineralWhich crystal scratches, which chips and which is worth it.Read the guide

Frequently asked questions

Which movement does the Seiko 5 Sports Suits use?

The 4R36, from the Seiko 4R (4R34, 4R35, 4R36 and 4R38) family, made by Seiko. It gives 41 h of power reserve at 21,600 bph.

Does it have hacking seconds and hand winding?

The seconds hand stops when you pull the crown, and it can be wound by hand by turning it.

Can you swim or dive with it?

It is water resistant to 100 m: you can swim and shower with it, but it is not designed for scuba diving.

What size wrist does it suit?

With a 44.6 mm lug-to-lug, it suits wrists from about 14.5 cm in circumference. Below that, the lugs reach the edge. You can work it out with your own measurement on this page.