Side by side

Seestern S450 Ocean StarvsYema Navygraf Chrono

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 Chrono
YemaNavygraf Chrono
MSRP $1,999

At a glance

12 of 29 specs differ
Diameter
S450 Ocean Star40mm
Navygraf Chrono40mm
Power Reserve
S450 Ocean Star41h
Navygraf Chrono40h
Water Resistance
S450 Ocean Star100m
Navygraf Chrono100m
MSRP
S450 Ocean Star$299
Navygraf Chrono$1,999

Full specifications

Case

3 specs
Category
Diver
Chronograph
Thickness
12mm
13.9mm
Lug-to-Lug
48mm

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$299
$1,999

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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 Chrono

Owners praise the Yema Navygraf Chrono for its handsome, versatile design and the value offered by its Valjoux 7750 movement. A reviewer notes the 40mm case's fully polished finish, which some feel clashes with its sporty aesthetic, and mentions its 13.9mm thickness is noticeable. One owner reported wearing the Yema Navygraf Chrono for two months without issues, receiving compliments. On balance, owners and reviewers find the Yema Navygraf Chrono to be a good-looking and well-specced watch for its price.

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