Spinnaker Spence 300vsYema Superman Dato CMM.10

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Spinnaker Spence 300 at true scale

Spence 300

Yema Superman Dato CMM.10 at true scale

Superman Dato CMM.10

Diameter

40mm

39.5mm

Lug-to-Lug

48mm

n/a

Thickness

11.5mm

lowest

11.8mm

Water Resistance

300m

300m

MSRP

$650

lowest

$1,777

Movement

Seiko NH35

Yema CMM.10

Case

3 specs
Diameter
40mm
39.5mm
Thickness
11.5mm
11.85mm
Lug-to-Lug
48mm
n/a

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Aquamarine
39.5mm Automatic

Movement

1 specs
Caliber
Seiko NH35
Yema CMM.10

Pricing

1 specs
MSRP
$650
$1,777
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Spinnaker Spence 300

Owners widely praise the Spinnaker Spence 300 for its slim 10.9mm case and 40mm diameter, offering a comfortable and versatile wear. Reviewers and owners alike highlight its value, with some seeing it as a budget alternative to more expensive dive watches. The watch features a Seiko NH35 automatic movement and 300m water resistance. However, some community members find the dial printing and bracelet finishing to be less refined, and a few suggest other brands offer better value at similar price points. On balance, owners and reviewers rate the Spinnaker Spence 300 highly for its impressive case dimensions and overall value proposition.

From video reviewers

The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.

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.