Side by side

Serica Ref. 5303 Diving ChronometervsCWC T20 General Service Quartz Watch

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
T20 General Service Quartz Watch
CWCT20 General Service Quartz Watch
MSRP $249

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
T20 General Service Quartz Watch38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
T20 General Service Quartz Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
T20 General Service Quartz Watch50m
MSRP
Ref. 5303 Diving Chronometer$1,768
T20 General Service Quartz Watch$249

Full specifications

Case

6 specs
Category
Diver
Field
Diameter
39mm
38mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
42mm
Lug Width
20mm
18.5mm
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal
Sapphire
Acrylic
AR Coating
Yes
Inner
Dial Color
Enamel Black
CWC T20 General Service Quartz Watch

Movement

4 specs
Caliber
M100 COSC
Ronda 515
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$249

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

CWC T20 General Service Quartz Watch

The CWC T20 General Service Quartz Watch is widely praised for its simple, clean, and classic look, with owners considering it a classy and comfortable field watch. Its 38mm tonneau case is seen by some as a cool retro piece representative of original MOD specifications, though others find this size too small for larger wrists. The watch is noted for keeping accurate time, with one owner reporting it as practical for everyday wear. It features a stainless steel case, sapphire crystal, and a Ronda 715 movement. A limitation mentioned is the fixed lugs, which restrict strap versatility. Overall, owners rate the CWC T20 General Service Quartz Watch highly for its classic military-inspired aesthetic and reliable timekeeping at an affordable price.

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