Side by side

Seestern S450 Ocean StarvsYema Superman Titanium MoonTide CMM.11 Limited Edition

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
Superman Titanium MoonTide CMM.11 Limited Edition
YemaSuperman Titanium MoonTide CMM.11 Limited Edition
MSRP $2,090

At a glance

15 of 29 specs differ
Diameter
S450 Ocean Star40mm
Superman Titanium MoonTide CMM.11 Limited Edition38.5mm
Power Reserve
S450 Ocean Star41h
Superman Titanium MoonTide CMM.11 Limited Edition40h
Water Resistance
S450 Ocean Star100m
Superman Titanium MoonTide CMM.11 Limited Edition300m
MSRP
S450 Ocean Star$299
Superman Titanium MoonTide CMM.11 Limited Edition$2,090

Full specifications

Case

6 specs
Diameter
40mm
38.5mm
Thickness
12mm
11.3mm
Lug-to-Lug
48mm
47mm
Lug Width
20mm
19mm
Material
316L Stainless Steel
Titanium
Water Resistance
100m
300m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
White
Titanium Scales Slim
Lume
Tritium
None

Movement

5 specs
Caliber
TMI NH35A
Yema CMM.11
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$2,090

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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.

Seestern S450 Ocean Star

Owners widely praise the Seestern S450 Ocean Star's Yachtmaster-style case and flawless bracelet finishing, with one owner noting the ST2130 movement keeps good time. The bezel action is described as having individual notches but feeling like a friction bezel, while another owner flags the bezel and crown action as smooth with perfect alignment. Lume is a point of contention, with one source describing it as a nice cool blue with ice-white application, while others note it as weak or not matching Prospex standards, despite using BGW-9. The watch is considered a "big boy" ideal for larger wrists (19cm+), potentially too large for 17cm wrists due to its size and non-tapering bracelet. Overall, owners rate the Seestern S450 Ocean Star highly for its build quality and finishing at the price point, despite some reservations about its size and lume intensity.

Yema Superman Titanium MoonTide CMM.11 Limited Edition

Owners widely praise the Yema Superman's in-house CMM.10 movement, noting its accuracy often exceeds COSC specifications, and appreciate its elegant diver design with vintage DNA. Reviewers highlight the sunburst dials with gilt accents and bright Super-LumiNova, with case size options of 39mm and 41mm contributing to its wearability. Some owners desire versions without gold accents, and the semi-gloss finish adds flash that may not appeal to all. The CMM.10 movement is rated for +5/-3 seconds per day. On balance, owners and reviewers rate the Yema Superman highly for its in-house movement and elegant vintage-inspired design at its price point.

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