Side by side

Spinnaker Spence 300vsYema Wristmaster Slim CMM.20

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

Spence 300
SpinnakerSpence 300
MSRP $650
Wristmaster Slim CMM.20
YemaWristmaster Slim CMM.20
MSRP $2,117

At a glance

9 of 29 specs differ
Diameter
Spence 30040mm
Wristmaster Slim CMM.2039mm
Power Reserve
Spence 30040h
Wristmaster Slim CMM.2040h
Water Resistance
Spence 300300m
Wristmaster Slim CMM.20100m
MSRP
Spence 300$650
Wristmaster Slim CMM.20$2,117

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
40mm
39mm
Thickness
11.5mm
9mm
Lug-to-Lug
48mm
Lug Width
20mm
24mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Aquamarine
Black

Movement

1 specs
Caliber
SII NH35A
Yema CMM.20

Pricing

1 specs
MSRP
$650
$2,117

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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.

Spinnaker Spence 300

The Spinnaker Spence 300 is widely praised for its slim 10.9mm case and 40mm diameter, offering a comfortable and uncommon thin diver design at its price point. Reviewers and owners highlight its value, especially below $350, and its blend of retro design with modern specifications, including a 300m depth rating and a fully indexed bezel. Some owners, however, find the dial printing and bracelet finishing to be less refined, with one noting the bracelet's male end links as a drawback. The consensus is that the Spinnaker Spence 300 is highly regarded for its exceptional value and wearable dimensions, making it a strong contender for an everyday sports watch.

Yema Wristmaster Slim CMM.20

The Yema Wristmaster Slim CMM.20 is widely praised for its compelling integrated bracelet design and comfortable 39mm wearability. Reviewers highlight its impressive value, featuring an in-house CMM.20 micro-rotor movement with a 70-hour power reserve, adjusted to -3/+7 seconds per day, all within a slim 9mm case. Some note the domed sapphire crystal can produce glare and the dial text is quite small. On balance, reviewers rate the Yema Wristmaster Slim CMM.20 highly for its integrated design and value proposition with a micro-rotor movement.

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