Bremont Altitude ChronographvsHamilton Jazzmaster Maestro Auto Chrono


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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Altitude Chronograph

Jazzmaster Maestro Auto Chrono
Diameter
42mm
45mm
Thickness
14.7mm
lowest
15.3mm
Water Resistance
100m
100m
Power Reserve
n/a
60h
MSRP
$6,300
$1,995
lowest
Movement
Bremont BE-50AE
Hamilton H-21
Case
5 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Bremont Altitude Chronograph is noted for its improved Roto Click bezel, offering better smoothness and click precision. Owners observe faint marks on the case sides and back, along with strap wear. One review flags the "DANGER EJECTION SEAT" wordmark on the dial as a divisive design choice that deviates from the MB series' usual tone. On balance, reviewers find the Bremont Altitude Chronograph to be a well-built watch with a refined bezel action, though some find dial text polarizing.
Owners widely praise the Hamilton Jazzmaster Maestro Auto Chrono's premium case finishing and versatile dial layout, suitable for both casual and formal wear. Some owners note the 45mm size can be bulky and may not fit under shirt cuffs, and a lack of a second hand is a deal-breaker for some. Accuracy figures range from gaining about 5 seconds per day to keeping time within 10 seconds per day even after many years without service. Concerns exist regarding the serviceability and potential maintenance costs of the H-21 movement. Overall, owners rate the Hamilton Jazzmaster Maestro Auto Chrono highly for its substantial build quality and attractive design despite some size and movement serviceability considerations.
The Valjoux 7750 chronograph movement is cited as a strength. Reviewers noted the movement is not without flaws.
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