Side by side

Baltic Hermétique SummervsGrand Seiko SLGB005

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

Hermétique Summer
BalticHermétique Summer
MSRP $594
SLGB005
Grand SeikoSLGB005
MSRP $11,100

At a glance

9 of 29 specs differ
Diameter
Hermétique Summer37mm
SLGB00537mm
Power Reserve
Hermétique Summer42h
SLGB00572h
Water Resistance
Hermétique Summer150m
SLGB005100m
MSRP
Hermétique Summer$594
SLGB005$11,100

Full specifications

Case

3 specs
Thickness
10.8mm
11.4mm
Lug-to-Lug
46mm
44.3mm
Water Resistance
150m
100m

Crystal & Dial

2 specs
Dial Color
Orange
Black
Lume
BGW9
None

Movement

3 specs
Caliber
Miyota 9039
9RB2
Type
Automatic
Spring Drive
Power Reserve
42h
72h

Pricing

1 specs
MSRP
$594
$11,100

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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.

Grand Seiko SLGB005

The Grand Seiko SLGB005 is widely praised for its stunning "Ice Forest" smoked purple dial, inspired by frost-covered trees, and its compact 37mm Ever-Brilliant Steel case. It is powered by the 9RB2 Spring Drive caliber, noted for its exceptional accuracy of ±3 seconds per month or ±20 seconds per year, and offers a 72-hour power reserve. Reviewers consistently highlight the dial's mesmerizing beauty and the case's sculpted design as significant strengths. However, multiple sources express disappointment that the Grand Seiko SLGB005 omits the micro-adjustment clasp found on other models, especially considering its $11,100 price point, though one reviewer found this did not detract from wearability. Overall, reviewers rate the Grand Seiko SLGB005 highly for its visually arresting dial and precise Spring Drive movement, despite the clasp oversight.

From video reviewers

The watch features a ±3 seconds per month accurate Ultra Fine Accuracy Calibre 9RB2 movement. The Ever-Brilliant Steel finish has polishing flaws that detract from the watch's appearance. Reviewers disagree on the movement's accuracy, with one reviewer citing ±3 seconds per month and another ±10 seconds per month.

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