Bremont Supermarine 300MvsCertina DS Action Diver 38mm Powermatic 80

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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.

Bremont Supermarine 300M at true scale

Supermarine 300M

Certina DS Action Diver 38mm Powermatic 80 at true scale

DS Action Diver 38mm Powermatic 80

Diameter

40mm

38mm

Lug-to-Lug

n/a

45.0mm

Thickness

12mm

lowest

13.2mm

Water Resistance

300m

300m

Power Reserve

n/a

80h

MSRP

$3,550

$1,045

lowest

Movement

Bremont BE-92AE

POWERMATIC 80.611

Case

5 specs
Diameter
40mm
38mm
Thickness
12mm
13.22mm
Lug-to-Lug
n/a
45.01mm
Lug Width
20mm
19mm
Material
904L Stainless Steel
Stainless Steel

Crystal & Dial

1 specs
Dial Color
Green
n/a

Movement

2 specs
Caliber
Bremont BE-92AE
POWERMATIC 80.611
Power Reserve
0h
80h

Pricing

1 specs
MSRP
$3,550
$1,045
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Reviews

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

Bremont Supermarine 300M

The Bremont Supermarine 300M is praised for its comfortable 40mm case, which some owners find wears well even on smaller wrists due to its lug design, outperforming some 40mm watches. One forum contributor notes the 40mm case is relatively compact for a 300m diver and is priced at $1375. A reviewer found the 40mm case comfortable. On balance, owners and reviewers appreciate the Bremont Supermarine 300M's wearable 40mm case size and comfortable wearability.

Certina DS Action Diver 38mm Powermatic 80

The Certina DS Action Diver 38mm Powermatic 80 is widely praised for its excellent value, robust build quality, and comfortable wearability, particularly on smaller wrists. Owners consistently highlight its smooth crown operation, excellent case finishing for the price, and the reliable Powermatic 80 movement, with accuracy reported between +1/+2 and -6 seconds per day. The watch is considered a well-balanced, classic-looking unisex dive watch with a dynamic sunburst dial and tank-like construction. However, some reviewers note that the 38mm version lacks a ceramic bezel, and one owner found the lume on the hour markers weak. Minor criticisms include end links that do not perfectly line up with the case and occasional bracelet hair-snagging, with one instance of disappointing bezel alignment for its price category. Overall, owners and reviewers rate the Certina DS Action Diver 38mm Powermatic 80 highly for its exceptional value and solid execution as a tool-watch.

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