Side by side

Seestern S450 Ocean StarvsYema Navygraf Phantom CMM.10 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
Navygraf Phantom CMM.10 Limited Edition
YemaNavygraf Phantom CMM.10 Limited Edition
MSRP $2,090

At a glance

13 of 29 specs differ
Diameter
S450 Ocean Star40mm
Navygraf Phantom CMM.10 Limited Edition38.5mm
Power Reserve
S450 Ocean Star41h
Navygraf Phantom CMM.10 Limited Edition40h
Water Resistance
S450 Ocean Star100m
Navygraf Phantom CMM.10 Limited Edition100m
MSRP
S450 Ocean Star$299
Navygraf Phantom CMM.10 Limited Edition$2,090

Full specifications

Case

4 specs
Diameter
40mm
38.5mm
Thickness
12mm
11.05mm
Lug-to-Lug
48mm
46mm
Lug Width
20mm
19mm

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
White
Phantom
Lume
Tritium
None

Movement

5 specs
Caliber
TMI NH35A
Yema CMM.10
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 Navygraf Phantom CMM.10 Limited Edition

Owners widely praise the Yema Navygraf Phantom CMM.10 Limited Edition for its vibrant blue dial and well-finished 39mm stainless steel case. The watch delivers an impressive 70-hour power reserve and accurate timekeeping, with one owner reporting -3 seconds over two weeks. The H-link bracelet's clasp is criticized by reviewers for being difficult to open and rattly, with the Marine Nationale strap being the preferred alternative. Overall, owners and reviewers rate the Yema Navygraf Phantom CMM.10 Limited Edition highly for its striking dial color and robust specifications at its price point.

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