Side by side

Citizen Promaster Diver EcozillavsMarathon GSAR (Government Search & Rescue) Diver's Automatic

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

Promaster Diver Ecozilla
CitizenPromaster Diver Ecozilla
MSRP $469
GSAR (Government Search & Rescue) Diver's Automatic
MarathonGSAR (Government Search & Rescue) Diver's Automatic
MSRP $2,100

At a glance

11 of 29 specs differ
Diameter
Promaster Diver Ecozilla48mm
GSAR (Government Search & Rescue) Diver's Automatic41mm
Power Reserve
Promaster Diver Ecozilla40h
GSAR (Government Search & Rescue) Diver's Automatic40h
Water Resistance
Promaster Diver Ecozilla300m
GSAR (Government Search & Rescue) Diver's Automatic300m
MSRP
Promaster Diver Ecozilla$469
GSAR (Government Search & Rescue) Diver's Automatic$2,100

Full specifications

Case

5 specs
Diameter
48mm
41mm
Thickness
12mm
14mm
Lug-to-Lug
46mm
48mm
Lug Width
29mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
Underside
Inner
Dial Color
Black
Anthracite

Movement

2 specs
Caliber
B873
Sellita SW200-1
Type
Solar
Automatic

Pricing

1 specs
MSRP
$469
$2,100

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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.

Citizen Promaster Diver Ecozilla

The Citizen Promaster Diver Ecozilla is widely praised for its reassuringly solid, overbuilt feel and excellent value, especially when on sale. Owners note that the second hand hits its markers well, with one owner reporting all nine of their Citizen watches exhibit proper alignment. The watch features robust 300m water resistance and vibrant lume. However, its substantial 48mm size and 18.6mm thickness create a massive wrist presence, and some owners question its wearability due to its chunky dimensions, with one noting the stainless steel version weighs a ton. On balance, owners and reviewers rate the Citizen Promaster Diver Ecozilla highly for its robust build and excellent value proposition.

Marathon GSAR (Government Search & Rescue) Diver's Automatic

The Marathon GSAR (Government Search & Rescue) Diver's Automatic is widely praised for its legibility, comfort, and exceptional tritium illumination, with reviewers highlighting its utilitarian, military-equipment feel and a 41mm case size considered ideal. Owners appreciate its grippy bezel and the 300 meters of water resistance provided by the screw-down crown, deeming it a solid value for a Swiss-made tool watch. Some owners report quality control issues, with one user needing to warranty two watches, and another notes the GSAR wears taller than other models, leading to occasional bumping. The reliable ETA 2824-A2 movement is a consistent feature. Overall, owners and reviewers rate the Marathon GSAR (Government Search & Rescue) Diver's Automatic highly for its bright tritium lume and robust, no-nonsense tool watch design.

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