Side by side

Hamilton Jazzmaster Maestro Auto ChronovsLongines HYDROCONQUEST GMT

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

Jazzmaster Maestro Auto Chrono
HamiltonJazzmaster Maestro Auto Chrono
MSRP $2,275
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

9 of 29 specs differ
Diameter
Jazzmaster Maestro Auto Chrono41mm
HYDROCONQUEST GMT41mm
Power Reserve
Jazzmaster Maestro Auto Chrono60h
HYDROCONQUEST GMT40h
Water Resistance
Jazzmaster Maestro Auto Chrono100m
HYDROCONQUEST GMT300m
MSRP
Jazzmaster Maestro Auto Chrono$2,275
HYDROCONQUEST GMT$3,350

Full specifications

Case

5 specs
Category
Chronograph
Diver
Thickness
15.1mm
12.9mm
Lug-to-Lug
46mm
49.4mm
Lug Width
22mm
21mm
Water Resistance
100m
300m

Crystal & Dial

1 specs
Dial Color
Silver
Green

Movement

2 specs
Caliber
H-21
L844.5
Power Reserve
60h
40h

Pricing

1 specs
MSRP
$2,275
$3,350

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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.

Hamilton Jazzmaster Maestro Auto Chrono

Owners widely praise the Hamilton Jazzmaster Maestro Auto Chrono for its dramatic quality and attention to detail, with its versatile design suitable for dressing up or down. Timekeeping is generally good, with one owner reporting gains of no more than 5 seconds per day, and another noting their 7750-based movement has kept time within 10 seconds per day even after 15 years without service. Some owners find the lack of a second hand a dealbreaker, and the 45mm size may not fit comfortably under sleeves. Concerns exist regarding potentially high maintenance costs and intervals. Overall, owners rate the Hamilton Jazzmaster Maestro Auto Chrono highly for its bulletproof build and classic, dressy appearance at an accessible price point.

Longines HYDROCONQUEST GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, smooth winding action, and overall value, with some finding its build quality and colorways superior to higher-priced competitors. Reviewers and owners alike note its robustness as a traveler's dive watch with a true GMT movement. Some owners find the round markers at 6 and 9 disrupt dial symmetry, and the GMT hour markers are described as tiny and difficult to read. The date wheel can be mismatched on certain dial colors, and the bracelet clasp is noted as sharp by one reviewer. While some owners wish for a smaller case size, others find the 41mm comfortable. The bezel action is flagged as having bounce-back by one owner, though the brushed finish effectively hides wear. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its robust build and excellent value proposition.

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