Certina DS Action Diver 43mm Powermatic 80vsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

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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.

Certina DS Action Diver 43mm Powermatic 80 at true scale

DS Action Diver 43mm Powermatic 80

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

Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

Diameter

43mm

42mm

Lug-to-Lug

45.0mm

lowest

48.6mm

Thickness

13.2mm

lowest

13.3mm

Water Resistance

300m

300m

Power Reserve

80h

highest

72h

MSRP

$1,045

lowest

$1,750

Movement

POWERMATIC 80.611

Seiko 6R54

Case

4 specs
Diameter
43mm
42mm
Thickness
13.22mm
13.3mm
Lug-to-Lug
45.01mm
48.6mm
Lug Width
19mm
20mm

Crystal & Dial

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

Movement

3 specs
Caliber
POWERMATIC 80.611
Seiko 6R54
Power Reserve
80h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,045
$1,750
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Reviews

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

Certina DS Action Diver 43mm Powermatic 80

The Certina DS Action Diver 43mm Powermatic 80 is widely praised for its exceptional value, robust build quality, and sporty character, with owners highlighting its striking sunburst blue dial and precise bezel alignment. Some reviewers note the 43mm size and NATO strap can make it thick for under-cuff wear, and one owner found the end links did not perfectly match the case. Accuracy figures vary, with one report of 3-6 seconds per day and another of +45 seconds over 47 days. Overall, owners and reviewers consider the Certina DS Action Diver 43mm Powermatic 80 an excellently priced and well-built tool watch that offers significant value for its price.

Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition is widely praised for its excellent quality and finishing for its price, with reviewers highlighting its beautiful case, bracelet, and Lumibrite lume. Owners appreciate the comfortable 42mm case size and the 4 o'clock crown position. The watch features a sapphire crystal and uses the in-house 6R54 automatic movement with a three-day power reserve. Some reviewers note that the GMT function is secondary and that the bezel clicks are quieter than expected. The 4:30 date window splits opinion among enthusiasts, and it is described as a "caller GMT" rather than a true "traveller GMT." Overall, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition highly for its excellent value, quality finishing, and comfortable wearability.

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