Strap matcher

Best straps for the Seiko Prospex Marinemaster 300

20 mm lugs, 44.3 mm case, reference SBDX001 (2000–2014). Try a strap below; the drawing is to scale.

Seiko Prospex Marinemaster 300 on a black rubber strap
Strap
Colour: Black
Strap width20 mm
At the buckle18 mm
Lug to lug50 mm

Looks that work on the Seiko Prospex Marinemaster 300

Seiko Prospex Marinemaster 300 specs

Made
2000–2014
Case
44.3 mm × 14.6 mm thick
Lug width
20 mm
Lug to lug
50 mm
Case material
stainless steel
Movement
Calibre 8L35, automatic
Water resistance
300 m
Nickname
MM300

From the maker's published figures, gathered with AI help and not yet checked against a watch in hand. Measure your lugs before you buy.

Strap size for the Seiko Prospex Marinemaster 300

What size strap fits the Seiko Prospex Marinemaster 300?

The Seiko Prospex Marinemaster 300 takes 20 mm straps: its lug width is 20 mm. A leather strap will usually taper to 18 mm at the buckle.

How big is the Seiko Prospex Marinemaster 300?

The case is 44.3 mm across, and about 50 mm from lug tip to lug tip.

What strap looks best on the Seiko Prospex Marinemaster 300?

Good options are a steel three-link bracelet, a black and grey stripe NATO strap, a taupe suede strap. Try them all on the drawing above.

Sizes come from published specs. Check yours before you buy: how to measure lug width.