Side by side

Seiko Prospex RotocallvsYema Superman Slim CMM.20

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

Prospex Rotocall
SeikoProspex Rotocall
MSRP $550
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

10 of 29 specs differ
Diameter
Prospex Rotocall37mm
Superman Slim CMM.2039mm
Power Reserve
Prospex Rotocall40h
Superman Slim CMM.2040h
Water Resistance
Prospex Rotocall100m
Superman Slim CMM.20300m
MSRP
Prospex Rotocall$550
Superman Slim CMM.20$2,372

Full specifications

Case

6 specs
Category
Sport
Diver
Diameter
37mm
39mm
Thickness
10.6mm
9.95mm
Lug-to-Lug
43.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

1 specs
Crystal
Hardlex
Domed Sapphire

Movement

2 specs
Caliber
A824
Yema CMM.20
Type
Quartz
Automatic

Pricing

1 specs
MSRP
$550
$2,372

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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.

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.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

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