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Seiko › Divers › Prospex › SPB317

Seiko SPB317

Prospex · Sea. Sold new

Video reviews

The Perfect Seiko Diver? | The Seiko SPB317
Worn & Wound · YouTube
Seiko SPB317 Slim Turtle
Random Rob · YouTube

Videos are made by independent reviewers and play from YouTube; they’re not ours. We picked ones that name this reference. Own one? Share your photos.

Where to buy

New · authorized

Seiko’s own warranty.

New · grey market (unauthorized)

Often cheaper. Covered by the store’s own warranty, not Seiko’s.

Pre-owned

Check condition, box and papers. Usually no warranty.

Search links show live listings, so check the exact reference before you buy. Prices change; each one shows when we checked it. We may earn a commission from some links. It doesn’t change your price or which stores we list. Authorized vs grey market vs pre-owned.

The basics

Price
$900
Seiko US list, 2026-10-23
Size
41 mm × 12.3 mm
46.9 mm lug to lug
Strap width
20 mm
Any 20 mm strap fits
Comes on
Silicone strap
Water resistance
200 m
Sapphire crystal
Yes
Lume
Hands, markers and bezel
Screw-down crown
Yes
Will it fit my wrist?

Rough rule of thumb from lug-to-lug length (46.9 mm), not a promise. Wrist shape matters; try one on if you can.

How it works day to day

Movement
Automatic, hand-winding
Caliber 6R35, rated +25 to -15 seconds per day
Bezel
Unidirectional rotating
Hacking seconds
Yes
Seconds hand stops when you pull the crown, so you can set the time exactly
Hand-winding
Yes
Power reserve
About 70 hours

Similar watches

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SRPE93
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SPB121
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Compare

SRPE93 vs SPB317: An entry Prospex Turtle against a sapphire-crystal Prospex diver.

Sources