Which is bigger, the Dumoreau Monopusher Chronograph or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition wears larger at 42.7mm versus 40mm for the Dumoreau Monopusher Chronograph — a 2.7mm difference across the dial.

Which has better water resistance, the Dumoreau Monopusher Chronograph or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition is rated to 200m versus 100m for the Dumoreau Monopusher Chronograph.

Which has a longer power reserve, the Dumoreau Monopusher Chronograph or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition carries a 70-hour power reserve against 63 hours on the Dumoreau Monopusher Chronograph.

What movement does the Dumoreau Monopusher Chronograph run compared to the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Dumoreau Monopusher Chronograph runs a manual caliber (Sellita SW510-M-MPC-B), while the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition runs a automatic (6R35).

Side by side

Dumoreau Monopusher ChronographvsSeiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

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

Add a watch

Dumoreau Monopusher Chronograph

monopusher-chronograph-reverse-panda-black

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

spb301j1

MSRP $1,350

At a glance

13 of 29 specs differ

Diameter

Monopusher Chronograph40mm

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm

Power Reserve

Monopusher Chronograph63h

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h

Water Resistance

Monopusher Chronograph100m

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m

MSRP

Monopusher Chronograph—

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

Full specifications

Case

5 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Sellita SW510-M-MPC-B

6R35

Type

Manual

Automatic

Power Reserve

63h

70h

Jewels

Pricing

1 specs

MSRP

—

$1,350

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Dumoreau Monopusher ChronographvsSeiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

At a glance

Full specifications

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