Side by side

Glycine Combat Sub Sport GMTvsSeestern S450 Ocean Star

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

Combat Sub Sport GMT
GlycineCombat Sub Sport GMT
MSRP $2,995
S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299

At a glance

19 of 29 specs differ
Diameter
Combat Sub Sport GMT42mm
S450 Ocean Star40mm
Power Reserve
Combat Sub Sport GMT48h
S450 Ocean Star41h
Water Resistance
Combat Sub Sport GMT200m
S450 Ocean Star100m
MSRP
Combat Sub Sport GMT$2,995
S450 Ocean Star$299

Full specifications

Case

9 specs
Category
GMT
Diver
Diameter
42mm
40mm
Thickness
10.85mm
12mm
Lug-to-Lug
48mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
200m
100m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Blue
White
Indices
Applied
Lume
Luminous
Tritium

Movement

4 specs
Caliber
SW330-2
TMI NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
48h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$2,995
$299

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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.

Glycine Combat Sub Sport GMT

Owners widely praise the Glycine Combat Sub Sport GMT for its solid build, slim wearability, and value, with many noting its comfortable fit due to curved lugs and thin case. Reviewers highlight its classic design, unique dial, and legible date window, while some owners report excellent bezel action and accuracy under +1 second per day after regulation. A minor criticism is a slightly off-color lume pip on the chapter ring, and one owner notes sub-par lume and inconsistent power reserve not always reaching 42 hours. On balance, owners and reviewers rate the Glycine Combat Sub Sport GMT highly for its comfortable wearability and value at the price point.

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.

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