Hamilton Jazzmaster Performer AutomaticvsBaltic Hermétique Summer

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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.

Jazzmaster Performer Automatic

Hermétique Summer
Diameter
38mm
37mm
Lug-to-Lug
n/a
46mm
Thickness
11.5mm
10.8mm
lowest
Water Resistance
100m
150m
highest
Power Reserve
80h
highest
42h
MSRP
$1,245
$594
lowest
Movement
Hamilton H-10
Miyota 9039
Case
4 specsCrystal & Dial
3 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Hamilton Jazzmaster Performer Automatic for its clean look, comfort, and stylish design, with one owner noting accuracy averaging just over 2 seconds per day. The 38mm case size is generally considered wearable, though one owner found the 34mm variant too small. A common point of contention among enthusiasts is a dislike for open-heart designs, which some find cluttered. One owner reported an internal movement failure causing the time to jump back, which was resolved through service. On balance, owners and reviewers rate the Hamilton Jazzmaster Performer Automatic highly for its comfort and attractive design at its price point.
The Baltic Hermétique Summer is praised for its compact 37mm brushed stainless steel case with a polished bezel and its vibrant, well-balanced dials. Reviewers note the strong blue glow from the BGW9 Super-LumiNova indices and the inclusion of color-matched FKM rubber straps or Baltic bracelets. The Miyota 9039 movement supports hacking and hand-winding. One reviewer flags that the recessed crown can be difficult to manipulate without long fingernails. On balance, reviewers highlight the Baltic Hermétique Summer's attractive design and value, despite the potential for crown manipulation issues.
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