Side by side

CWC 6BB-WRvsSeiko Prospex Sea

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

The bottom line

The 34mm Prospex Sea wears 8mm narrower than the 42mm 6BB-WR — that's a meaningful jump on most wrists.

What people say

Owners + reviewers, side by side

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

CWC 6BB-WR

The CWC 6BB-WR is widely praised for its legible matte black dial, strong lume, and crisp chronograph operation. Owners and reviewers note its military heritage and rugged, confidence-inspiring build with a screw-down crown and pushers. The Sellita SW510 BH b automatic movement kept time within COSC range in testing. However, its 14.9mm thickness and 80g weight make it wear large, and the cam-lever movement lacks the satisfying click of a column wheel. Fixed bars limit strap options. On balance, owners and reviewers rate the CWC 6BB-WR highly for its legible dial and robust pilot chronograph design at its price point.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many appreciating its comfortable wearability due to its case shape and lug-to-lug distance. Reviewers consistently highlight its impressive finishing and classic dive watch design, often noting the bright LumiBrite lume. Some owners find the watch to be large, thick, and heavy, while others consider it the perfect size, indicating a split opinion on wearability for smaller wrists. The power reserve from some movements is noted as less than newer variants, and the clasp quality receives mixed feedback. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional finishing and value proposition in the dive watch market.

Where to get them

Check prices & track

CWC 6BB-WR
CWC 6BB-WR
MSRP $1,875
Seiko Prospex Sea
Seiko Prospex Sea
MSRP $795
6BB-WR
CWC6BB-WR
MSRP $1,875
Prospex Sea
SeikoProspex Sea
MSRP $795

At a glance

12 of 29 specs differ
Diameter
6BB-WR42mm
Prospex Sea34mm
Power Reserve
6BB-WR40h
Prospex Sea40h
Water Resistance
6BB-WR100m
Prospex Sea200m
MSRP
6BB-WR$1,875
Prospex Sea$795

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
42mm
34mm
Thickness
14.9mm
8.7mm
Lug-to-Lug
49mm
40.8mm
Lug Width
20mm
16mm
Water Resistance
100m
200m

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
CWC 6BB-WR
Black
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
Sellita SW510
6N01
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$1,875
$795

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