Seiko Prospex Marinemaster 300 (SLA021) Dimensions
Prospex — Complete specifications and wrist fit guide
Dimensions
Diameter
44.3 mm
Lug-to-Lug
50.5 mm
Thickness
15.4 mm
Lug Width
20 mm
Dimension Diagram
Case
Material
Stainless Steel (DiaShield coating)
Crystal
Sapphire
Water Resistance
300 m
Bezel
Unidirectional rotating, ceramic insert
Crown
Screw-down
Caseback
Solid (monoblock)
Dial Color
Black
Movement
Caliber
8L35
Type
Automatic
Power Reserve
50 hours
Frequency
28,800 vph
Context
MSRP
$3,200
Production
2017 - present
Predecessor
SBDX017
Wrist Fit Guide
With a lug-to-lug distance of 50.5 mm, the Seiko Prospex Marinemaster 300 fits wrists 7.0" (17.8 cm) and larger comfortably.
Wears similar to: Casio Full Metal CasiOak (GM-B2100D-1A), Casio EQB-1100D-1A, Casio EFS-S590D-1A, Casio GA-2200-1A, Casio G-LIDE (GBX-100-1)
Where to Buy
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