Side by side

CWC RN81 Clearance Diver Automatic WatchvsSeiko Prospex Sea

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

What people say

Owners + reviewers, side by side

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

CWC RN81 Clearance Diver Automatic Watch

Owners widely praise the CWC diver for its historical significance, build quality, and tool-watch nature, with many finding it comfortable and a go-to piece. Some owners appreciate the fixed springbars for NATO straps and the option of various case finishes. However, the CWC is frequently considered overpriced, with buyers paying a premium for the brand's history and reissue status, especially for the automatic version. The acrylic bezel's durability and the "faux patina" lume color are noted concerns for some. On balance, owners and reviewers find the CWC diver to be a well-built, historically significant tool watch, though many question its value proposition at its price point.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent value, solid build, and comfortable wearability, with specific mentions of its matte black dial, excellent lume, and cushion case that wears smaller than its dimensions suggest. The 4R36 movement is noted for hacking and hand-winding capabilities, and the bezel action is described as smooth and precise. Some owners find the watch to be a legitimate tool with a fair price, while others describe it as big, thick, and heavy, uncomfortable for smaller wrists, though this is subjective as one owner found the size perfect. The solar quartz movement is also highlighted as a collection-worthy feature. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and comfortable, classic design.

At a glance

10 of 29 specs differ
Diameter
RN81 Clearance Diver Automatic Watch41mm
Prospex Sea42mm
Power Reserve
RN81 Clearance Diver Automatic Watch
Prospex Sea72h
Water Resistance
RN81 Clearance Diver Automatic Watch300m
Prospex Sea300m
MSRP
RN81 Clearance Diver Automatic Watch$1,875
Prospex Sea

Full specifications

Case

3 specs
Diameter
41mm
42mm
Thickness
12.7mm
13.3mm
Lug-to-Lug
47mm
48.6mm

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Dial Color
CWC RN81 Clearance Diver Automatic Watch
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW200-1
6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,875
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