Side by side

Bremont Altitude ChronographvsSinn U18

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

Altitude Chronograph
BremontAltitude Chronograph
MSRP $6,300
U18
SinnU18
MSRP $3,488
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 Chronograph

Owners note faint marks on the case sides and back, with minor wear and creasing on the strap. Reviewers flag the "DANGER EJECTION SEAT" wordmark on the dial as a divisive design choice that disrupts the MB series' usual stark tone, though they praise the improved smoothness and click precision of the Roto Click rotating bezel. On balance, the Bremont Altitude Chronograph elicits mixed reactions, with design elements like the dial text being a point of contention for reviewers.

Sinn U18

The Sinn U18 is praised for its unique deep blue/green dial with three-dimensional oxygen bubbles that change with light, and its comfortable, easily adjustable bracelet. Owners find the watch stunning and a piece of history, appreciating the refined hands. The Sinn U18 features a 44mm, 15.5mm thick case made from German submarine steel, offering a 2000-meter dive specification and Sinn's Ar-Dehumidifying technology, powered by a Sellita SW300-1 movement. The case thickness is apparent, and the watch comes as a complete set with box and papers for $3,000-$3,680. On balance, owners and reviewers rate the Sinn U18 highly for its striking dial and robust build.

At a glance

15 of 29 specs differ
Diameter
Altitude Chronograph42mm
U1844mm
Power Reserve
Altitude Chronograph40h
U1842h
Water Resistance
Altitude Chronograph100m
U182,000m
MSRP
Altitude Chronograph$6,300
U18$3,488

Full specifications

Case

8 specs
Category
Chronograph
Diver
Diameter
42mm
44mm
Thickness
14.7mm
15.5mm
Lug Width
14.7mm
22mm
Material
316L Stainless Steel (DLC coated)
high-strength
Finish
Brushed and polished
Water Resistance
100m
2000m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Silver
Black
Indices
Applied

Movement

2 specs
Caliber
BE-50AE
SW300-1
Power Reserve
40h
42h

Pricing

1 specs
MSRP
$6,300
$3,488
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