Side by side

Seestern S450 Ocean StarvsYema Pearldiver

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
Pearldiver
YemaPearldiver
MSRP $491

At a glance

11 of 29 specs differ
Diameter
S450 Ocean Star40mm
Pearldiver38mm
Power Reserve
S450 Ocean Star41h
Pearldiver40h
Water Resistance
S450 Ocean Star100m
Pearldiver100m
MSRP
S450 Ocean Star$299
Pearldiver$491

Full specifications

Case

3 specs
Diameter
40mm
38mm
Thickness
12mm
14mm
Lug-to-Lug
48mm
46mm

Crystal & Dial

2 specs
Dial Color
White
Steel
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
$491

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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 Pearldiver

Owners widely praise the Yema Pearldiver's vintage aesthetic, clean dial, and sub-40mm dimensions with short lug-to-lug, noting its in-house movement and solid build quality. Accuracy figures range from dead-on at 0 seconds per day to +2 seconds per day, though some owners have reported dead-on-arrival movements requiring returns. The bracelet clasp is described by one owner as "pretty cheap." Some find the design pedestrian and lacking uniqueness, with the faux lume color noted as too dark by one commenter. Overall, owners rate the Yema Pearldiver highly for its vintage appeal and wearable dimensions at the price.

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