Side by side

Halios Seaforth IVvsYema Superman Steel CMM.10

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
Superman Steel CMM.10
YemaSuperman Steel CMM.10
MSRP $1,890

At a glance

10 of 29 specs differ
Diameter
Seaforth IV40mm
Superman Steel CMM.1039mm
Power Reserve
Seaforth IV40h
Superman Steel CMM.1040h
Water Resistance
Seaforth IV200m
Superman Steel CMM.10300m
MSRP
Seaforth IV$765
Superman Steel CMM.10$1,890

Full specifications

Case

6 specs
Diameter
40mm
39mm
Thickness
12.4mm
11.3mm
Lug-to-Lug
46.5mm
Lug Width
20mm
19mm
Material
Titanium
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

2 specs
Crystal
Sapphire (double-domed)
Domed Sapphire
Dial Color
Blue
Steel

Movement

1 specs
Caliber
Sellita SW200-2
Yema CMM.10

Pricing

1 specs
MSRP
$765
$1,890

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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.

Halios Seaforth IV

Owners widely praise the Halios Sunburst Blue for its perfect 40mm size, stunning sunburst dial, and excellent lume, with one owner calling it Halios's best effort and a potential "Omega AT killer." The ETA 2824 movement is noted as running smoothly, and the watch is considered a great value with strong resale. Some owners desire larger sizes or different dial colors, and one reviewer found the Sinn 556i more versatile. The sapphire bezel is described as tall and flat, which is a point of contention for some. Overall, owners rate the Halios Sunburst Blue highly for its design, size, and value.

From video reviewers

The sunburst blue dial is a standout feature. Limited water resistance is a shared concern.

Yema Superman Steel CMM.10

Owners widely praise the Yema Superman Steel CMM.10 for its refined casework, including polished lug bevels and an elegant crown guard, and its comfortable 39mm x 10.5mm dimensions. The glossy black lacquer dial and bezel insert are noted for adding depth, and the in-house CMM.10 movement is reported to be accurate, with one owner observing a loss of only 2 seconds over 2 days. The scales bracelet is described as gorgeous and nearly invisible on the wrist, though some find its polished center links too flashy. One reviewer flagged the signature bezel lock mechanism as flimsy and inconvenient. The CMM.10 automatic movement offers a 70-hour power reserve and is regulated to within +5/-3 seconds per day. On balance, owners and reviewers rate the Yema Superman Steel CMM.10 highly for its refined finishing and comfortable wearability at its price point.

From video reviewers

The Yema Steel features an in-house movement with a micro-rotor, one of the most beautiful at this price point. The watch's clasp feels a bit thin, which is a notable drawback. Reviewers disagree on the movement's power reserve, with one reviewer noting a 42-hour reserve and the other not mentioning power reserve at all.

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