Side by side

Core Timepieces The River WatchvsSeiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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The River Watch
Core TimepiecesThe River Watch
MSRP $540
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
SeikoProspex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
MSRP $3,900
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At a glance

14 of 29 specs differ
Diameter
The River Watch42mm
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition42.6mm
Power Reserve
The River Watch—
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition72h
Water Resistance
The River Watch300m
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition300m
MSRP
The River Watch$540
Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition$3,900

Full specifications

Case

6 specs
Category
—
Diver
Diameter
42mm
42.6mm
Thickness
—
14.1mm
Lug-to-Lug
—
49.3mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
—
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH34A
8L45
Power Reserve
—
72h
Jewels
25
35

Pricing

1 specs
MSRP
—
$3,900
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