Side by side

CWC T20 General Service Quartz WatchvsMarathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

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

T20 General Service Quartz Watch
CWCT20 General Service Quartz Watch
MSRP $249
JDD (Jumbo Day/Date) Anthracite Diver's Automatic
MarathonJDD (Jumbo Day/Date) Anthracite Diver's Automatic
MSRP $3,250

At a glance

13 of 29 specs differ
Diameter
T20 General Service Quartz Watch38mm
JDD (Jumbo Day/Date) Anthracite Diver's Automatic46mm
Power Reserve
T20 General Service Quartz Watch40h
JDD (Jumbo Day/Date) Anthracite Diver's Automatic40h
Water Resistance
T20 General Service Quartz Watch50m
JDD (Jumbo Day/Date) Anthracite Diver's Automatic300m
MSRP
T20 General Service Quartz Watch$249
JDD (Jumbo Day/Date) Anthracite Diver's Automatic$3,250

Full specifications

Case

7 specs
Category
Field
Diver
Diameter
38mm
46mm
Thickness
12mm
18mm
Lug-to-Lug
42mm
55mm
Lug Width
18.5mm
22mm
Material
Stainless Steel
316L Stainless Steel (Anthracite IP)
Water Resistance
50m
300m

Crystal & Dial

3 specs
Crystal
Acrylic
Sapphire
Dial Color
CWC T20 General Service Quartz Watch
Anthracite
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Ronda 515
Sellita SW220-1
Type
Quartz
Automatic

Pricing

1 specs
MSRP
$249
$3,250

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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 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.

Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

Owners widely praise the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic as a tough, underrated tool watch with lifestyle appeal, highlighting its robust build and tritium lume for excellent legibility. However, its 46mm size is a common criticism, with some finding it heavy and top-heavy, and the OEM rubber strap stiff. One owner noted the watch runs about 10 seconds fast after three days, and the ETA 2836-2 movement offers approximately two days of power reserve. On balance, owners and reviewers rate the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic highly for its robust tool-watch build and legibility, despite its substantial size.

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