Side by side

Bremont Altitude Perpetual Calendar GMTvsHamilton Khaki Aviation Takeoff Auto Chrono

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 Takeoff Auto Chrono
HamiltonKhaki Aviation Takeoff Auto Chrono
MSRP $3,575

At a glance

10 of 29 specs differ
Diameter
Altitude Perpetual Calendar GMT42mm
Khaki Aviation Takeoff Auto Chrono46mm
Power Reserve
Altitude Perpetual Calendar GMT40h
Khaki Aviation Takeoff Auto Chrono60h
Water Resistance
Altitude Perpetual Calendar GMT
Khaki Aviation Takeoff Auto Chrono50m
MSRP
Altitude Perpetual Calendar GMT$38,450
Khaki Aviation Takeoff Auto Chrono$3,575

Full specifications

Case

6 specs
Category
GMT
Pilot
Diameter
42mm
46mm
Thickness
12.65mm
16.2mm
Lug-to-Lug
46mm
Material
Titanium
Stainless Steel
Water Resistance
50m

Crystal & Dial

1 specs
Dial Color
Blue
Black

Movement

2 specs
Caliber
H-31
Power Reserve
40h
60h

Pricing

1 specs
MSRP
$38,450
$3,575

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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 Takeoff Auto Chrono

The Hamilton Khaki Aviation Takeoff Auto Chrono is noted for its unique bullhead chronograph design and detachable functionality for desktop display, with a PVD case and yellow accents. Owners praise its solid construction, precise indices, and smooth bezel action, alongside a detailed champagne dial, crisp printing, and retro hands with good lume. However, its extreme thickness and 46.3mm width are flagged as compromising daily wearability, and some find the sizable crown guards hinder usability, while a rattling bracelet with a difficult-to-remove design is also mentioned. The watch uses the Hamilton H-31 automatic chronograph movement with a 60-hour power reserve and is a limited edition of 1999 units. On balance, owners and reviewers appreciate the Hamilton Khaki Aviation Takeoff Auto Chrono for its distinctive design and pilot-inspired legibility, despite practical concerns regarding its size and wearability.

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