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Seiko › Divers › Prospex › SPB143

Seiko SPB143

Also covers SPB149: the same watch in other colors or straps.

Prospex · 62MAS / 1965 heritage diver. No longer sold new by Seiko US

Real-world photos

Seiko SPB143: On the wrist, grey dial on the steel bracelet
On the wrist, grey dial on the steel bracelet. Photo: Deerpeter, CC BY-SA 4.0 via Wikimedia Commons

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Video reviews

Is This The Purest Seiko Dive Watch? The Seiko SPB143
Teddy Baldassarre Reviews · YouTube
The Seiko Prospex SPB143: An Elevated Diver With Heritage Inspiration | A Week On The Wrist
Hodinkee · YouTube

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

What reviewers agree on

Liked
  • Compact 40.5 mm case that wears well on most wrists
  • Finishing is a clear step up from cheaper Seiko divers
  • Very bright lume, 200 m and about 70 hours of power reserve
Worth knowing
  • Opinions on the bracelet and clasp are split: some like it, some find it chunky

Our summary of points that come up in more than one review, in our own words. Read the originals: Teddy Baldassarre, WatchGecko.

Where to buy

New · authorized

No longer sold new by Seiko in the US.

No seller listed for this one yet.

New · grey market (unauthorized)

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

Pre-owned

The main way to buy this one now. Check condition, box and papers.

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.

Colors and versions (2)

Same case, movement and size; the versions differ in dial color, bezel or strap. Each reference number below is a separate model you can search for.

ReferenceComes onPriceStatusLook at it / buy
SPB143——DiscontinuedeBay · Jomashop
SPB149——DiscontinuedeBay · Jomashop

The basics

Price
Not sold new by Seiko US
See pre-owned options under Where to buy
Size
40.5 mm × 13.2 mm
47.6 mm lug to lug
Strap width
20 mm
Any 20 mm strap fits
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 (47.6 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 s/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

SPB121
Prospex
39.5 mm · sapphire · 200 m
SPB155
Prospex
38 mm · sapphire · 200 m
SPB317
Prospex
41 mm · sapphire · 200 m
SPB153
Prospex
42.7 mm · sapphire · 200 m

Compare

SPB143 vs SPB453: The 62MAS-style Prospex diver and its newer 6R55-powered replacement.

Sources