Side by side

Bremont Altitude Perpetual Calendar GMTvsHamilton Khaki Aviation X-Wind 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 X-Wind Auto chrono
HamiltonKhaki Aviation X-Wind Auto chrono
MSRP $2,095

At a glance

9 of 29 specs differ
Diameter
Altitude Perpetual Calendar GMT42mm
Khaki Aviation X-Wind Auto chrono44mm
Power Reserve
Altitude Perpetual Calendar GMT40h
Khaki Aviation X-Wind Auto chrono60h
Water Resistance
Altitude Perpetual Calendar GMT
Khaki Aviation X-Wind Auto chrono100m
MSRP
Altitude Perpetual Calendar GMT$38,450
Khaki Aviation X-Wind Auto chrono$2,095

Full specifications

Case

6 specs
Category
GMT
Pilot
Diameter
42mm
44mm
Thickness
12.65mm
15.6mm
Lug-to-Lug
46mm
Material
Titanium
Stainless Steel
Water Resistance
100m

Movement

2 specs
Caliber
H-21
Power Reserve
40h
60h

Pricing

1 specs
MSRP
$38,450
$2,095

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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 X-Wind Auto chrono

Owners widely praise the Hamilton Khaki Aviation X-Wind Auto chrono for its good quality for the price and versatility with straps. Reviewers highlight its unique drift angle calculator function as a horological curio and legitimate navigational tool, noting its modified Valjoux 7750 movement provides a 60-hour power reserve. Some owners find the busy dial and left-handed crown/pusher setup unusual, and its lume could be stronger, while others consider it a heavy travel watch with features not useful for everyday use. On balance, owners and reviewers rate the Hamilton Khaki Aviation X-Wind Auto chrono highly for its functionality and build quality at its price point.

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