Side by side

Seestern S450 Ocean StarvsLongines MASTER COLLECTION

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
MASTER COLLECTION
LonginesMASTER COLLECTION
MSRP $2,350

At a glance

22 of 29 specs differ
Diameter
S450 Ocean Star40mm
MASTER COLLECTION29mm
Power Reserve
S450 Ocean Star41h
MASTER COLLECTION45h
Water Resistance
S450 Ocean Star100m
MASTER COLLECTION30m
MSRP
S450 Ocean Star$299
MASTER COLLECTION$2,350

Full specifications

Case

9 specs
Category
Diver
Diameter
40mm
29mm
Thickness
12mm
9mm
Lug-to-Lug
48mm
34.5mm
Lug Width
20mm
15mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Water Resistance
100m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
White
Silver
Indices
Applied
Painted Arabic numerals
Lume
Tritium
Super-LumiNova

Movement

7 specs
Caliber
TMI NH35A
L592.5
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
45h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
GMT, Date
Hours, minutes, seconds and date

Pricing

1 specs
MSRP
$299
$2,350

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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.

Longines MASTER COLLECTION

Owners and reviewers widely praise the Longines Master Collection for its excellent finishing and value, with specific mentions of beautiful dials featuring engraved Breguet numerals and blued hands. The movement offers a 72-hour power reserve, and the classical design is noted as versatile. Some owners report the bracelet lacks sufficient micro-adjustment options for a precise fit, and one owner experienced a broken moon phase setting mechanism requiring service. The Master Collection Annual Calendar has 30m water resistance, considered light by one reviewer. Overall, the consensus is that owners and reviewers rate the Longines Master Collection highly for its exceptional value and refined finishing.

From video reviewers

The watch has a strong wrist presence and comfort. The movement accuracy is also a notable feature, delivering luxury value at its price point.

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