Which is cheaper, the CWC RN Automatic Divers Watch Mk.2 with Date or the Seiko Prospex Sea?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $625, against $1,249 for the CWC RN Automatic Divers Watch Mk.2 with Date — a $624 gap before any retailer discounting.

Which is bigger, the CWC RN Automatic Divers Watch Mk.2 with Date or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 43.8mm versus 41mm for the CWC RN Automatic Divers Watch Mk.2 with Date — a 2.8mm difference across the dial.

Which has better water resistance, the CWC RN Automatic Divers Watch Mk.2 with Date or the Seiko Prospex Sea?

The CWC RN Automatic Divers Watch Mk.2 with Date is rated to 300m versus 200m for the Seiko Prospex Sea.

Which has a longer power reserve, the CWC RN Automatic Divers Watch Mk.2 with Date or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 41-hour power reserve against 40 hours on the CWC RN Automatic Divers Watch Mk.2 with Date.

What movement does the CWC RN Automatic Divers Watch Mk.2 with Date run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the CWC RN Automatic Divers Watch Mk.2 with Date uses the Sellita SW200-1 and the Seiko Prospex Sea uses the 4R35.

Side by side

CWC RN Automatic Divers Watch Mk.2 with DatevsSeiko Prospex Sea

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

CWC RN Automatic Divers Watch Mk.2 with Date

cwc-royal-navy-diver-automatic-mk2-with-date

MSRP $1,249

Seiko Prospex Sea

srpe37

MSRP $625

At a glance

12 of 29 specs differ

Diameter

RN Automatic Divers Watch Mk.2 with Date41mm

Prospex Sea43.8mm

Power Reserve

RN Automatic Divers Watch Mk.2 with Date40h

Prospex Sea41h

Water Resistance

RN Automatic Divers Watch Mk.2 with Date300m

Prospex Sea200m

MSRP

RN Automatic Divers Watch Mk.2 with Date$1,249

Prospex Sea$625

Full specifications

Case

5 specs

Diameter

41mm

43.8mm

Thickness

12mm

12.8mm

Lug-to-Lug

47mm

48.7mm

Lug Width

20mm

22mm

Water Resistance

300m

200m

Crystal & Dial

3 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

CWC RN Automatic Divers Watch Mk.2 with Date, Stainless Steel (RN300-MT AS120-D)

Black

Lume

Super-LumiNova

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Sellita SW200-1

4R35

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$1,249

$625

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