Side by side

Seestern S450 Ocean StarvsYema Wristmaster Slim Small Seconds CMM.29

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
Wristmaster Slim Small Seconds CMM.29
YemaWristmaster Slim Small Seconds CMM.29
MSRP $2,249

At a glance

13 of 29 specs differ
Diameter
S450 Ocean Star40mm
Wristmaster Slim Small Seconds CMM.2939mm
Power Reserve
S450 Ocean Star41h
Wristmaster Slim Small Seconds CMM.2940h
Water Resistance
S450 Ocean Star100m
Wristmaster Slim Small Seconds CMM.29100m
MSRP
S450 Ocean Star$299
Wristmaster Slim Small Seconds CMM.29$2,249

Full specifications

Case

5 specs
Category
Diver
Dress
Diameter
40mm
39mm
Thickness
12mm
9mm
Lug-to-Lug
48mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

2 specs
Dial Color
White
Black
Lume
Tritium
None

Movement

5 specs
Caliber
TMI NH35A
Yema CMM.29
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$2,249

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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 Wristmaster Slim Small Seconds CMM.29

Owners widely praise the Yema Wristmaster Slim Small Seconds CMM.29 for its slim 9.5mm case, unique nature-inspired dial, and brushed steel finish. The micro-rotor movement is noted for its 4Hz beat rate and 42-hour power reserve, regulated to -/+ 10 seconds per day. Some owners report concerns regarding the movement and warranty process, while a reviewer questioned the value proposition at its price point and noted minor finishing inconsistencies on a prototype. On balance, the Yema Wristmaster Slim Small Seconds CMM.29 is highly regarded by owners for its distinctive design and comfortable wearability.

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