Side by side

CWC Automatic Divers Watch Mk.2 BlackvsSeestern S450 Ocean Star

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

Automatic Divers Watch Mk.2 Black
CWCAutomatic Divers Watch Mk.2 Black
MSRP $1,249
S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299

At a glance

12 of 29 specs differ
Diameter
Automatic Divers Watch Mk.2 Black41mm
S450 Ocean Star40mm
Power Reserve
Automatic Divers Watch Mk.2 Black40h
S450 Ocean Star41h
Water Resistance
Automatic Divers Watch Mk.2 Black300m
S450 Ocean Star100m
MSRP
Automatic Divers Watch Mk.2 Black$1,249
S450 Ocean Star$299

Full specifications

Case

4 specs
Diameter
41mm
40mm
Lug-to-Lug
47mm
48mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
CWC Automatic Divers Watch Mk.2 Black (SF300 AS120)
White
Lume
Super-LumiNova
Tritium

Movement

5 specs
Caliber
Sellita SW200-1
TMI NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
40h
41h
Jewels
25
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$1,249
$299

Follow this matchup

Get a note when CWC Automatic Divers Watch Mk.2 Black vs Seestern S450 Ocean Star gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

CWC Automatic Divers Watch Mk.2 Black

Owners widely praise the CWC Automatic Divers Watch Mk.2 Black for its brushed chapter ring, precise 120-click bezel, clear sapphire crystal, excellent case finishing, and significantly improved lume. The watch is considered a terrific value with solid construction. Some owners express a preference for a matte finish for a more tool-like appearance, though polished versions offer a dressier look and easier scratch removal. On balance, owners rate the CWC Automatic Divers Watch Mk.2 Black highly for its tool-like features and excellent value.

From video reviewers

The bezel action is smooth. The price has increased due to popularity.

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.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.