Baltic Aquascaphe MK2vsSeiko Prospex 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.

Baltic Aquascaphe MK2 at true scale

Aquascaphe MK2

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

Prospex Marinemaster 1965 Heritage Diver's Watch

Diameter

37mm

39.5mm

Lug-to-Lug

45mm

lowest

47.2mm

Thickness

12.9mm

12.3mm

lowest

Water Resistance

200m

200m

Power Reserve

42h

45h

highest

MSRP

$680

lowest

$2,800

Movement

Miyota 9039

Seiko 6L37

Case

3 specs
Diameter
37mm
39.5mm
Thickness
12.9mm
12.3mm
Lug-to-Lug
45mm
47.2mm

Crystal & Dial

4 specs
Crystal Shape
n/a
Box
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
Blue
n/a
Lume
BGW9
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Miyota 9039
Seiko 6L37
Power Reserve
42h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$680
$2,800
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Reviews

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

Baltic Aquascaphe MK2

Owners widely praise the Baltic Aquascaphe MK2 for its refined case design, improved finishing, and value, with many highlighting the added crown guards and Maxi Dial as significant upgrades. Reviewers note the collection's contemporary updates, including a reworked bezel and applied markers, striking a balance between modern practicality and vintage aesthetics. Some owners find the long, straight lugs a drawback, and one owner reported disappointing accuracy averaging +10.5 seconds per day. Overall, owners and reviewers rate the Baltic Aquascaphe MK2 highly for its enhanced design and build quality at its price point.

From video reviewers

The Baltic Aquascaphe MK2 features 3D Super-LumiNova indexes for improved legibility. A notable weakness is the lack of lume brightness. Reviewers disagree on the optimal case size, with one reviewer noting a 41mm stainless steel case is comfortable for everyday wear, while the other mentions 37mm and 39.5mm case sizes are available.

Seiko Prospex 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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