Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the CWC RN Automatic Divers Watch Mk.2 with Date?

At MSRP the CWC RN Automatic Divers Watch Mk.2 with Date is the cheaper of the two at $1,249, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $519 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the CWC RN Automatic Divers Watch Mk.2 with Date?

The CWC RN Automatic Divers Watch Mk.2 with Date wears larger at 41mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 2mm difference across the dial.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the CWC RN Automatic Divers Watch Mk.2 with Date?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the CWC RN Automatic Divers Watch Mk.2 with Date.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the CWC RN Automatic Divers Watch Mk.2 with Date?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the CWC RN Automatic Divers Watch Mk.2 with Date uses the Sellita SW200-1.

Side by side

Serica Ref. 5303 Diving ChronometervsCWC RN Automatic Divers Watch Mk.2 with Date

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

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

CWC RN Automatic Divers Watch Mk.2 with Date

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

MSRP $1,249

At a glance

9 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

RN Automatic Divers Watch Mk.2 with Date41mm

Power Reserve

Ref. 5303 Diving Chronometer42h

RN Automatic Divers Watch Mk.2 with Date40h

Water Resistance

Ref. 5303 Diving Chronometer300m

RN Automatic Divers Watch Mk.2 with Date300m

MSRP

Ref. 5303 Diving Chronometer$1,768

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

Full specifications

Case

3 specs

Diameter

39mm

41mm

Thickness

12.2mm

12mm

Lug-to-Lug

46.5mm

47mm

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

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

Movement

3 specs

Caliber

M100 COSC

Sellita SW200-1

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$1,249

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