CWC 1980 RN Divers Automatic Re-IssuevsSeiko Prospex Sea 1968 Heritage Diver's GMT

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

CWC 1980 RN Divers Automatic Re-Issue at true scale

1980 RN Divers Automatic Re-Issue

Seiko Prospex Sea 1968 Heritage Diver's GMT at true scale

Prospex Sea 1968 Heritage Diver's GMT

Diameter

45mm

42mm

Lug-to-Lug

47mm

lowest

48.6mm

Thickness

12.7mm

lowest

12.9mm

Water Resistance

300m

highest

200m

Power Reserve

n/a

72h

MSRP

$3,747

$1,500

lowest

Movement

ETA 2824-2

Seiko 6R54

Case

4 specs
Diameter
45mm
42mm
Thickness
12.7mm
12.9mm
Lug-to-Lug
47mm
48.6mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
ETA 2824-2
Seiko 6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$3,747
$1,500
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Reviews

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

CWC 1980 RN Divers Automatic Re-Issue

Owners widely praise the CWC (Cabot Watch Company) 1980 RN Divers Automatic Re-Issue Watch for its faithful homage to the original, with specific call-outs for the dial markings, vintage logo, and luminous acrylic bezel. Reviewers and owners alike appreciate the Monnin-style case, which is noted for wearing beautifully, and the matte black dial with legible hands. Accuracy is reported as excellent, with one owner noting under +2 seconds per day. The fixed lugs are seen by some as a drawback, though others consider them a positive feature for a tool watch. The "faux patina" lume receives mixed reactions, with some finding it too gold and glossy, while others favor it. The polished case finish is also noted as unusual for a military watch. Some owners question the value proposition at its price point, citing the ETA movement, though others see it as a strong alternative to more expensive options.

Seiko Prospex Sea 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and value, with owners noting its comfortable wearability and attractive aesthetic, particularly the silver/white sunray dial and blue ceramic bezel. The improved bracelet clasp with excellent micro-adjustment is a recurring positive point. Some owners report accuracy figures of +3 seconds per day or +/- 5 seconds per day, exceeding the movement's stated range. However, the GMT functionality is considered secondary to its dive watch capabilities by some, with the GMT scale being difficult to read and the caller-style GMT movement being a drawback for certain users. The dial contrast is also noted as lacking by some, and the crown at 4 o'clock is undesirable for a few. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT highly for its blend of dive watch character and GMT functionality, offering significant features for its price.

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