Which is cheaper, the CWC Automatic Divers Watch Mk.2 Black or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

At MSRP the CWC Automatic Divers Watch Mk.2 Black is the cheaper of the two at $1,249, against $1,350 for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — a $101 gap before any retailer discounting.

Which is bigger, the CWC Automatic Divers Watch Mk.2 Black 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 41mm for the CWC Automatic Divers Watch Mk.2 Black — a 1.7mm difference across the dial.

Which has better water resistance, the CWC Automatic Divers Watch Mk.2 Black or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The CWC Automatic Divers Watch Mk.2 Black is rated to 300m versus 200m for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition.

Which has a longer power reserve, the CWC Automatic Divers Watch Mk.2 Black 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 40 hours on the CWC Automatic Divers Watch Mk.2 Black.

What movement does the CWC Automatic Divers Watch Mk.2 Black run compared to the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

Both watches run automatic movements — the CWC Automatic Divers Watch Mk.2 Black uses the Sellita SW200-1 and the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition uses the 6R35.

Side by side

CWC Automatic Divers Watch Mk.2 BlackvsSeiko 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.

CWC Automatic Divers Watch Mk.2 Black

cwc-royal-navy-black-diver-automatic-mk-2

MSRP $1,249

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

spb301j1

MSRP $1,350

At a glance

12 of 29 specs differ

Diameter

Automatic Divers Watch Mk.2 Black41mm

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

Power Reserve

Automatic Divers Watch Mk.2 Black40h

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

Water Resistance

Automatic Divers Watch Mk.2 Black300m

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

MSRP

Automatic Divers Watch Mk.2 Black$1,249

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

Full specifications

Case

4 specs

Diameter

41mm

42.7mm

Thickness

12mm

13.2mm

Lug-to-Lug

47mm

46.4mm

Water Resistance

300m

200m

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

CWC Automatic Divers Watch Mk.2 Black (SF300 AS120)

Black

Lume

Super-LumiNova

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Sellita SW200-1

6R35

Power Reserve

40h

70h

Jewels

Pricing

1 specs

MSRP

$1,249

$1,350

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

CWC Automatic Divers Watch Mk.2 Black

Owners widely praise the CWC Automatic Divers Watch Mk.2 Black for its brushed chapter ring, precise 120-click bezel, clear sapphire crystal, excellent case finishing, and significantly improved lume. The watch is considered a terrific value with solid construction. Some owners express a preference for a matte finish for a more tool-like appearance, though polished versions offer a dressier look and easier scratch removal. On balance, owners rate the CWC Automatic Divers Watch Mk.2 Black highly for its tool-like features and excellent value.

From video reviewers

The bezel action is smooth. The price has increased due to popularity.

WatchUSeek·2

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 praised for its beautiful design and refinement over previous models, featuring vertically textured glacier-inspired dials. Owners, however, consider the €1500 RRP too high, suggesting a price closer to €900-€1000, noting the aluminum bezel insert instead of ceramic. Some owners report the 6R movement runs slow. On balance, owners find the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition beautiful and a refinement, but the price and aluminum bezel are points of contention.

Hodinkee

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