Elliot Brown OSO Limited EditionvsYema Superman Slim CMM.20

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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.

Elliot Brown OSO Limited Edition at true scale

OSO Limited Edition

Yema Superman Slim CMM.20 at true scale

Superman Slim CMM.20

Diameter

43mm

39mm

Thickness

11.4mm

9.9mm

lowest

Water Resistance

200m

300m

highest

MSRP

$576

lowest

$2,372

Movement

Ronda 715

Yema CMM.20

Case

6 specs
Diameter
43mm
39mm
Thickness
11.4mm
9.95mm
Lug-to-Lug
n/a
n/a
Lug Width
n/a
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
n/a
Black

Movement

2 specs
Caliber
Ronda 715
Yema CMM.20
Type
Quartz
Mechanical

Pricing

1 specs
MSRP
$576
$2,372
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Reviews

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

Elliot Brown OSO Limited Edition

Owners praise the Elliot Brown OSO Limited Edition's "bad ass" blackout aesthetic. One owner expresses concern regarding the crystal and legibility. Reviewers find the Beachmaster line, including the OSO Limited Edition's siblings, to be exceptionally well-built tool watches that feel rugged and durable, though some find the crowns slightly undersized for convenient bezel adjustment and time setting. On balance, owners and reviewers value the Elliot Brown OSO Limited Edition for its rugged build and distinctive blackout look.

Yema Superman Slim CMM.20

Owners widely praise the Yema Superman Slim CMM.20's appealing retro design, 39mm case, and the in-house CMM.20 micro-rotor movement, with some specifically noting the fish scale bracelet. Reviewers and owners alike mention the movement's design can lead to a "jittery" seconds hand, though Yema states this does not impact performance. Some owners question the $2500 MSRP, finding it overpriced, while others note initial stiffness in the bracelet that improves with wear. Finishing inconsistencies were noted on a prototype, and the stamped clasp on the bracelet is considered subpar by one reviewer. Overall, owners and reviewers find the Yema Superman Slim CMM.20 a compelling option for its vintage styling and unique micro-rotor movement, despite some concerns about its value proposition and minor execution details.

From video reviewers

The upgraded CMM.20 micro-rotor movement is a significant enhancement. Reviewers noted the slim profile and redesigned case. One reviewer indicated a significant flaw was discussed, but the nature of this imperfection was not specified.