Side by side

Seiko Prospex SPEEDTIMER MechanicalvsYema Superman Dato CMM.10

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

Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995
Superman Dato CMM.10
YemaSuperman Dato CMM.10
MSRP $1,777

At a glance

14 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Superman Dato CMM.1039.5mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Superman Dato CMM.1040h
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Superman Dato CMM.10300m
MSRP
Prospex SPEEDTIMER Mechanical$995
Superman Dato CMM.10$1,777

Full specifications

Case

5 specs
Category
Chronograph
Diver
Thickness
12mm
11.85mm
Lug-to-Lug
44.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
39.5mm Automatic
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
6R55
Yema CMM.10
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$995
$1,777

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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 Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

Yema Superman Dato CMM.10

Owners widely praise the Yema Superman Dato CMM.10 for its excellent value and retro-inspired design, with particular appreciation for the tropical dial and faded bezel. The in-house CMM.10 movement is noted for its 70-hour power reserve and stated accuracy of +5/-3 seconds per day. Some owners find the strap uncomfortable on smaller wrists, and the bezel lock mechanism is considered flimsy by one reviewer. The CMM.10 movement is thicker than alternative micro-rotor movements. Overall, owners rate the Yema Superman Dato CMM.10 highly for its distinctive aesthetic and strong value proposition.

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