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Seiko › Divers › Prospex › HBF001

Seiko HBF001

Also covers HBF002: the same watch in other colors or straps.

Prospex · Marinemaster. Sold new

Video reviews

New Seiko Marinemaster (HBF001)
Click Spring Reviews · YouTube
The New Seiko Marinemaster HBF001 | Don’t Buy the Hype
Kirby Young · 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.

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
HBF001—$3,600Sold newSee it at Seiko · eBay · Jomashop
HBF002—$3,900Sold newSee it at Seiko · eBay · Jomashop

The basics

Price
$3,600
Seiko US list, 2026-10-23
Size
42.6 mm × 14.1 mm
49.3 mm lug to lug
Strap width
20 mm
Any 20 mm strap fits
Water resistance
300 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 (49.3 mm), not a promise. Wrist shape matters; try one on if you can.

How it works day to day

Movement
Automatic, hand-winding
Caliber 8L45, rated +10 to -5 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 72 hours

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Sources