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 $2,550

At a glance

21 of 29 specs differ
Diameter
S450 Ocean Star40mm
MASTER COLLECTION40mm
Power Reserve
S450 Ocean Star41h
MASTER COLLECTION72h
Water Resistance
S450 Ocean Star100m
MASTER COLLECTION30m
MSRP
S450 Ocean Star$299
MASTER COLLECTION$2,550

Full specifications

Case

8 specs
Category
Diver
Thickness
12mm
9.35mm
Lug-to-Lug
48mm
46.8mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Water Resistance
100m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
White
Green
Indices
Applied
Lume
Tritium
None

Movement

7 specs
Caliber
TMI NH35A
L888.5
Beat Rate
21,600 vph
0 vph
Power Reserve
41h
72h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$2,550

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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

The Longines Master Collection is widely praised for its excellent value, with owners and reviewers highlighting its attractive finishing and classic, dressy styling. The L893 caliber offers a 72-hour power reserve, and the collection includes models with complications like annual calendars and moon phase chronographs at competitive prices. Some owners note that the bracelet lacks micro-adjustments for a perfect fit, and one reviewer found the case finishing homogenous with pushers that felt cheap. The Master Collection Chronograph is noted for its excellent fit and finish and vintage theme, while the Small Seconds variant's dial features engraved Breguet numerals but the subdial cuts off the "7" asymmetrically, and its case is considered slightly thicker than ideal. One owner reported the moon phase setting mechanism on their chronograph may require service, and the Annual Calendar variant has 30m water resistance.

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