Side by side

Bremont Altitude Perpetual Calendar GMTvsHamilton Khaki Aviation Converter Auto

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

Altitude Perpetual Calendar GMT
BremontAltitude Perpetual Calendar GMT
MSRP $38,450
Khaki Aviation Converter Auto
HamiltonKhaki Aviation Converter Auto
MSRP $1,345

At a glance

10 of 29 specs differ
Diameter
Altitude Perpetual Calendar GMT42mm
Khaki Aviation Converter Auto42mm
Power Reserve
Altitude Perpetual Calendar GMT40h
Khaki Aviation Converter Auto80h
Water Resistance
Altitude Perpetual Calendar GMT
Khaki Aviation Converter Auto100m
MSRP
Altitude Perpetual Calendar GMT$38,450
Khaki Aviation Converter Auto$1,345

Full specifications

Case

6 specs
Category
GMT
Pilot
Thickness
12.65mm
10.87mm
Lug-to-Lug
46mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel
Water Resistance
100m

Crystal & Dial

1 specs
Dial Color
Blue
Black

Movement

2 specs
Caliber
H-10
Power Reserve
40h
80h

Pricing

1 specs
MSRP
$38,450
$1,345

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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 Perpetual Calendar GMT

The Bremont Altitude Perpetual Calendar GMT is a highly exclusive piece, with one owner noting its $44,000 price point raises questions about its target audience and suggesting it may be a limited production showpiece. Reviewers highlight its refined Trip-Tick case, now featuring softer curves, a 42mm diameter, and a 12.23mm thickness in grade 2 titanium, though the oversized crowns are flagged as a potential drawback. Overall, owners and reviewers acknowledge the Bremont Altitude Perpetual Calendar GMT as a distinctive, albeit niche, high-complication offering with a notable case refinement.

Hamilton Khaki Aviation Converter Auto

The Hamilton Khaki Aviation Converter Auto is recognized for its classic pilot's watch aesthetic, featuring a functional bi-directional slide rule bezel with a mineral glass insert for scratch protection. Reviewers highlight its instrument-heavy design, well-balanced dial, and robust 42mm or 44mm case with a satin-brushed finish and polished accents. The watch is equipped with applied indexes and hands filled with Super-LumiNova for legibility, and a flat sapphire crystal with double anti-reflective coating. The automatic models utilize the H-10 movement, offering a 60-hour power reserve, while the chronograph version uses the H-21-Si movement. Overall, reviewers praise the Hamilton Khaki Aviation Converter Auto for its attractive, functional pilot's watch design and robust build at its price point.

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