Which is cheaper, the Bremont Altitude 39 Date or the Baltic Hermétique Summer?

At MSRP the Baltic Hermétique Summer is the cheaper of the two at $594, against $4,250 for the Bremont Altitude 39 Date — a $3,656 gap before any retailer discounting.

Which is bigger, the Bremont Altitude 39 Date or the Baltic Hermétique Summer?

The Bremont Altitude 39 Date wears larger at 39mm versus 37mm for the Baltic Hermétique Summer — a 2mm difference across the dial.

Which has better water resistance, the Bremont Altitude 39 Date or the Baltic Hermétique Summer?

The Baltic Hermétique Summer is rated to 150m versus 100m for the Bremont Altitude 39 Date.

Which has a longer power reserve, the Bremont Altitude 39 Date or the Baltic Hermétique Summer?

The Baltic Hermétique Summer carries a 42-hour power reserve against 40 hours on the Bremont Altitude 39 Date.

What movement does the Bremont Altitude 39 Date run compared to the Baltic Hermétique Summer?

Both watches run automatic movements — the Bremont Altitude 39 Date uses the BE-92AE and the Baltic Hermétique Summer uses the Miyota 9039.

Side by side

Bremont Altitude 39 DatevsBaltic Hermétique Summer

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

Bremont Altitude 39 Date

alt39-dt-ss-si-l-s

MSRP $4,250

Baltic Hermétique Summer

hermetique-summer-orange

MSRP $594

At a glance

12 of 29 specs differ

Diameter

Altitude 39 Date39mm

Hermétique Summer37mm

Power Reserve

Altitude 39 Date40h

Hermétique Summer42h

Water Resistance

Altitude 39 Date100m

Hermétique Summer150m

MSRP

Altitude 39 Date$4,250

Hermétique Summer$594

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Inner

Yes

Dial Color

Silver

Orange

Lume

None

BGW9

Movement

2 specs

Caliber

BE-92AE

Miyota 9039

Power Reserve

40h

42h

Pricing

1 specs

MSRP

$4,250

$594

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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.

Bremont Altitude 39 Date

Owners and reviewers widely praise the Bremont Altitude 39 Date as a sleek, legible, and everyday-suited pilot's watch, noting its comfortable 39mm 904L steel case and clean dial design. The La Joux-Perret G100 movement is recognized for its 68-hour power reserve and smooth winding feel. Some owners note the bracelet lacks micro-adjustments. On balance, the consensus is that the Bremont Altitude 39 Date is highly regarded for its refined finishing and wearability at 39mm.

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.

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