Side by side

Seestern S450 Ocean StarvsSpinnaker Tesei Mille Metri 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
Tesei Mille Metri GMT
SpinnakerTesei Mille Metri GMT
MSRP $559

At a glance

14 of 29 specs differ
Diameter
S450 Ocean Star40mm
Tesei Mille Metri GMT44mm
Power Reserve
S450 Ocean Star41h
Tesei Mille Metri GMT40h
Water Resistance
S450 Ocean Star100m
Tesei Mille Metri GMT1,000m
MSRP
S450 Ocean Star$299
Tesei Mille Metri GMT$559

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
40mm
44mm
Thickness
12mm
16mm
Lug-to-Lug
48mm
52mm
Lug Width
20mm
22mm
Water Resistance
100m
1000m

Crystal & Dial

2 specs
Dial Color
White
Black
Lume
Tritium
None

Movement

5 specs
Caliber
TMI NH35A
Seiko NH34A
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$559

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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.

Spinnaker Tesei Mille Metri GMT

The Spinnaker Fleuss Midnight Black features a reliable and accurate Japanese TMI NH35 Automatic Movement with 3 Hands and Date. A potential drawback is the watch's relatively low 15 ATM water-resistance rating compared to other watches in its class. Reviewers disagree on the watch's suitability for larger wrists, with one reviewer noting a 43mm diameter and 51mm lug-to-lug fit, while the other mentions a 51mm lug-to-lug measurement.

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