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.

Bremont Altitude Chronograph at true scale

Altitude Chronograph

Hamilton Jazzmaster Maestro Auto Chrono at true scale

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 specs
Diameter
42mm
45mm
Thickness
14.7mm
15.35mm
Lug-to-Lug
n/a
n/a
Lug Width
14.7mm
23mm
Material
316L Stainless Steel (DLC coated)
Stainless Steel

Crystal & Dial

1 specs
Dial Color
Silver
Blue

Movement

2 specs
Caliber
Bremont BE-50AE
Hamilton H-21
Power Reserve
0h
60h

Pricing

1 specs
MSRP
$6,300
$1,995
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Bremont Altitude Chronograph

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.

Hamilton Jazzmaster Maestro Auto Chrono

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.

From video reviewers

The Valjoux 7750 chronograph movement is cited as a strength. Reviewers noted the movement is not without flaws.