Side by side

Seestern S450 Ocean StarvsTornek-Rayville CISO M38 Field

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

S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
CISO M38 Field
Tornek-RayvilleCISO M38 Field
MSRP $695

At a glance

14 of 29 specs differ
Diameter
S450 Ocean Star40mm
CISO M38 Field38mm
Power Reserve
S450 Ocean Star41h
CISO M38 Field42h
Water Resistance
S450 Ocean Star100m
CISO M38 Field100m
MSRP
S450 Ocean Star$299
CISO M38 Field$695

Full specifications

Case

5 specs
Category
Diver
Diameter
40mm
38mm
Thickness
12mm
12.45mm
Lug-to-Lug
48mm
43.6mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
White
Black
Lume
Tritium
Superluminova

Movement

5 specs
Caliber
TMI NH35A
TMI NH36
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
42h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$695

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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.

Tornek-Rayville CISO M38 Field

Owners widely report the Tornek-Rayville CISO M38 Field offers high overall quality with a comfortable bracelet featuring single-sided screw links. The watch exhibits minimal wear, with only hairline scratches and a faint, difficult-to-photograph bezel mark. On balance, owners value the Tornek-Rayville CISO M38 Field for its robust build and comfortable wearability.

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