Side by side

Seestern S450 Ocean StarvsNOMOS Glashütte Tangomat GMT

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
Tangomat GMT
NOMOS GlashütteTangomat GMT
MSRP $5,740

At a glance

16 of 29 specs differ
Diameter
S450 Ocean Star40mm
Tangomat GMT40mm
Power Reserve
S450 Ocean Star41h
Tangomat GMT42 hoursh
Water Resistance
S450 Ocean Star100m
Tangomat GMT30m
MSRP
S450 Ocean Star$299
Tangomat GMT$5,740

Full specifications

Case

7 specs
Category
Diver
GMT
Thickness
12mm
10.9mm
Lug-to-Lug
48mm
50.5mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Water Resistance
100m
30m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Indices
Applied
Lume
Tritium
None

Movement

4 specs
Caliber
TMI NH35A
DUW 5201
Power Reserve
41h
42 hoursh
Jewels
24
26
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$5,740

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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.

NOMOS Glashütte Tangomat GMT

Owners and reviewers widely praise the NOMOS Glashütte Tangomat GMT for its elegant Bauhaus design, detailed finishing, and true in-house GMT movement, with many considering it excellent value. The watch's simplicity and user-friendly world time dial are highlighted as refreshing departures from busy designs. Some owners find the 40mm case wears larger than expected, and the GMT function, which uses a disk adjusted by a pusher, is noted as requiring manual adjustment and can be less convenient than a traditional hour hand for some users. One owner reported a daily accuracy drift of 25-35 seconds, while another experienced accidental pressing of the timezone pusher. On balance, owners and reviewers rate the NOMOS Glashütte Tangomat GMT highly for its unique in-house GMT complication and refined aesthetic at an accessible price point.

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