Side by side

Seiko Prospex SPEEDTIMERvsYema Superman Slim CMM.20

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

Prospex SPEEDTIMER
SeikoProspex SPEEDTIMER
MSRP $2,200
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

14 of 29 specs differ
Diameter
Prospex SPEEDTIMER42mm
Superman Slim CMM.2039mm
Power Reserve
Prospex SPEEDTIMER40h
Superman Slim CMM.2040h
Water Resistance
Prospex SPEEDTIMER100m
Superman Slim CMM.20300m
MSRP
Prospex SPEEDTIMER$2,200
Superman Slim CMM.20$2,372

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
42mm
39mm
Thickness
12.9mm
9.95mm
Lug-to-Lug
49.6mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Curved
Flat
AR Coating
Super-clear coating
Inner
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
5X83
Yema CMM.20
Type
Quartz
Automatic
Jewels
14
25

Pricing

1 specs
MSRP
$2,200
$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 SPEEDTIMER

Owners widely praise the Seiko Prospex SPEEDTIMER for its unique dial colors and vintage-inspired design, with many appreciating its compact 39mm case size and 100m or 200m water resistance. Reviewers and owners note the V192 solar movement’s power reserve indicator and its reliability, though some owners express a preference for automatic movements. One owner finds the $700 price for a solar quartz model expensive, while another criticizes the €860 price point and desires a thinner case and a bracelet with quick-release or micro-adjustment. On balance, owners and reviewers appreciate the Seiko Prospex SPEEDTIMER for its distinctive aesthetic and versatile wearability, despite some reservations about its price and case thickness.

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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