Aquatico Sea Sentinel Tritium Light Blue DialvsSeiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

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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.

Aquatico Sea Sentinel Tritium Light Blue Dial at true scale

Sea Sentinel Tritium Light Blue Dial

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch at true scale

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

Diameter

38mm

39.5mm

Lug-to-Lug

n/a

47.2mm

Thickness

12.8mm

12.3mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

n/a

45h

MSRP

$699

lowest

$2,800

Movement

Miyota 9015

Seiko 6L37

Case

5 specs
Diameter
38mm
39.5mm
Thickness
12.8mm
12.3mm
Lug-to-Lug
n/a
47.2mm
Material
316L surgical-grade stainless steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

4 specs
Crystal Shape
n/a
Box
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
Miyota 9015
Seiko 6L37
Power Reserve
0h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$699
$2,800
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Reviews

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

Aquatico Sea Sentinel Tritium Light Blue Dial

Owners widely praise the Aquatico Sea Sentinel Tritium Light Blue Dial's eye-catching dial, which performs well in all lighting conditions. The bracelet, featuring a milled clasp, is also frequently cited as high-quality for the price. Some owners note the case design is generic for a tool watch, and one owner reported a rotor issue attributed to the movement. The Aquatico Sea Sentinel Tritium Light Blue Dial is valued at $254-$299. On balance, owners rate the Aquatico Sea Sentinel Tritium Light Blue Dial highly for its impressive dial and quality bracelet at its price point.

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

The Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch is praised for its modern execution of a classic design, with reviewers noting the appealing 39.5mm case size and updated bracelet that improve wearability. Some reviewers mention the 6L37 movement has a 46-hour power reserve, with accuracy rated around -10/+15 seconds per day. A drawback identified by reviewers is the lack of tool-free micro-adjustment on the clasp. Overall, owners and reviewers find the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch to be a handsome re-interpretation of a beloved design, with its improved wearability being a key strength.

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