Side by side

Baltic Hermétique SummervsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Hermétique Summer
BalticHermétique Summer
MSRP $594
What people say

Owners + reviewers, side by side

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

Baltic Hermétique Summer

Reviewers highlight the Baltic Hermétique Summer's compact 37mm brushed case with a polished bezel and 150 meters of water resistance. The watch features glossy dials in bright colors with raised BGW9 Super-LumiNova indices that emit a strong blue glow, and it comes with color-matched FKM rubber straps or Baltic bracelets. The Miyota 9039 movement supports hacking and hand-winding. However, the recessed crown can be difficult to manipulate if fingernails are not long enough, and the movement has a stated accuracy of -10/+30 seconds per day. Overall, reviewers praise the Baltic Hermétique Summer for its well-balanced, colorful dials and strong lume at an affordable price point.

Seiko Prospex Sea 1968 Heritage Diver's GMT Watch

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch offers a 300-meter depth rating and a caller-style GMT complication powered by the Caliber 6R54 movement, which provides a 72-hour power reserve. Reviewers note its refined clasp with extensive micro-adjustment. However, the movement's accuracy, ranging from +25 to -15 seconds per day, is considered a drawback by some. Overall, reviewers highlight the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch as a good reminder of Seiko's value, despite the wide accuracy range of its movement.

At a glance

12 of 29 specs differ
Diameter
Hermétique Summer37mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
Hermétique Summer42h
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
Hermétique Summer150m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
Hermétique Summer$594
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

5 specs
Category
Dress
Diver
Diameter
37mm
42mm
Thickness
10.8mm
13.3mm
Lug-to-Lug
46mm
48.6mm
Water Resistance
150m
300m

Crystal & Dial

3 specs
AR Coating
Yes
Anti-reflective coating on inner surface
Dial Color
Orange
Black
Lume
BGW9
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Miyota 9039
6R54
Power Reserve
42h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$594
$1,700
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