SeikoProspex King Samurai PADI
A scale drawing from the manufacturer’s dimensions; the official photo is pending. Header: a Seiko Prospex on the wrist.
Indicative price band. The exact price is on Amazon.
See price on Amazon- An angular diver with sapphire, a ceramic bezel and 200 m; flatter and sharper than the Turtle.
- 4R35 movement with 41 h of power reserve at 21,600 bph.
- Hacking seconds and hand winding.
- Sapphire crystal and 200 m water resistance.
- 43.8 mm diameter, 12.8 mm thick and 48.7 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
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.
With a 17 cm circumference, your wrist is about 56 mm wide.
Specifications
Movement
| Movement | 4R35 |
|---|---|
| Movement maker | Seiko |
| Power reserve | 41 h |
| Beat rate | 21,600 bph |
| Hacking seconds | Yes |
| Hand winding | Yes |
Case and crystal
| Diameter | 43.8 mm |
|---|---|
| Thickness | 12.8 mm |
| Lug-to-lug | 48.7 mm |
| Case | Steel |
| Crystal | Sapphire |
| Water resistance | 200 m |
| Rotating bezel | Yes, unidirectional, ceramic insert |
| Display caseback | No |
Strap and dial
| Lug width | 22 mm |
|---|---|
| Strap or bracelet | Silicone strap |
| Dial | Blue |
| Complications | Date |
Buying
| Indicative price band | €530–580 |
|---|---|
| Style | Dive |
| Brand origin | Japan |
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.
Against its rivals
| Figure | Seiko Prospex King Samurai PADI | Seiko Prospex King Turtle PADI | Citizen Promaster Fujitsubo |
|---|---|---|---|
| Indicative price band | €530–580 | €550–600 | €560–620 |
| Movement | 4R35 | 4R36 | 9051 |
| Power reserve | 41 h | 41 h | 42 h |
| Beat rate | 21,600 bph | 21,600 bph | 28,800 bph |
| Crystal | Sapphire | Sapphire | Sapphire |
| Water resistance | 200 m | 200 m | 200 m |
| Diameter | 43.8 mm | 45 mm | 41 mm |
| Thickness | 12.8 mm | 13.2 mm | — |
| Lug-to-lug | 48.7 mm | 47.7 mm | — |
| Hacking seconds | Yes | Yes | Yes |
| Hand winding | Yes | Yes | Yes |
| Rotating bezel | Yes | Yes | Yes |
| Strap or bracelet | Silicone strap | Steel bracelet | Titanium bracelet |
| Brand origin | Japan | Japan | Japan |
| See price on AmazonSee specs | See price on AmazonSee specs | See 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
Power reserveHow long it keeps running off the wrist, and why 80 hours changes daily life.Read the guide 
Sapphire, Hardlex or mineralWhich crystal scratches, which chips and which is worth it.Read the guide Frequently asked questions
Which movement does the Seiko Prospex King Samurai PADI use?
The 4R35, 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 200 m: fine for swimming and diving. For scuba diving, check that the model meets ISO 6425.
What size wrist does it suit?
With a 48.7 mm lug-to-lug, it suits wrists from about 16 cm in circumference. Below that, the lugs reach the edge. You can work it out with your own measurement on this page.