Side by side

Citizen Promaster Diver EcozillavsSeiko Prospex Rotocall

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

Promaster Diver Ecozilla
CitizenPromaster Diver Ecozilla
MSRP $469
Prospex Rotocall
SeikoProspex Rotocall
MSRP $550

At a glance

11 of 29 specs differ
Diameter
Promaster Diver Ecozilla48mm
Prospex Rotocall37mm
Power Reserve
Promaster Diver Ecozilla40h
Prospex Rotocall40h
Water Resistance
Promaster Diver Ecozilla300m
Prospex Rotocall100m
MSRP
Promaster Diver Ecozilla$469
Prospex Rotocall$550

Full specifications

Case

6 specs
Category
Diver
Sport
Diameter
48mm
37mm
Thickness
12mm
10.6mm
Lug-to-Lug
46mm
43.5mm
Lug Width
29mm
20mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Crystal
Mineral
Hardlex
AR Coating
Underside
Inner

Movement

2 specs
Caliber
B873
A824
Type
Solar
Quartz

Pricing

1 specs
MSRP
$469
$550

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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.

Seiko Prospex Rotocall

Owners widely praise the Seiko Prospex Rotocall for its charismatic retro design and comfortable 37mm size, with many appreciating its space-faring heritage. However, multiple sources criticize its price point, suggesting it is too high for an all-digital quartz watch with features like a stamped clasp, mineral crystal, and standard quartz movement. Some owners also note drawbacks such as a flimsy battery mount and split pin bracelet construction. On balance, owners and reviewers find the Seiko Prospex Rotocall visually appealing and a faithful re-release, but its value proposition is frequently questioned due to its price.

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