Baltic Aquascaphe MK2vsSeiko 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.

Baltic Aquascaphe MK2 at true scale

Aquascaphe MK2

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

Prospex Sea 1968 Heritage Diver's GMT

Diameter

37mm

42mm

Lug-to-Lug

45mm

lowest

48.6mm

Thickness

12.9mm

12.9mm

Water Resistance

200m

200m

Power Reserve

42h

72h

highest

MSRP

$680

lowest

$1,500

Movement

Miyota 9039

Seiko 6R54

Case

2 specs
Diameter
37mm
42mm
Lug-to-Lug
45mm
48.6mm

Crystal & Dial

3 specs
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 6R54
Power Reserve
42h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$680
$1,500
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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 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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