Sartory Billard SB04-EvsStraum Jan Mayen
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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.

SB04-E

Jan Mayen
Diameter
39.5mm
38.7mm
Lug-to-Lug
46mm
n/a
Thickness
10.3mm
lowest
11.5mm
Water Resistance
100m
100m
Power Reserve
68h
68h
MSRP
$3,609
$2,250
lowest
Movement
La Joux-Perret G101
La Joux-Perret G101
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Sartory Billard SB04-E for its impressive and deep dials, with specific mentions of the 12 Soleil pattern and the Exquisite Blue Guilloché appearing to move like water in the light. Reviewers highlight its sensible 39.5mm size and 100m water resistance, noting the overall composition looks more expensive than its price. One owner points out slightly sharp edges on the caseback and suggests a more domed crystal. The watch utilizes the La Joux-Perret G101 automatic movement with a 68-hour power reserve. Overall, owners and reviewers rate the Sartory Billard SB04-E highly for its unique dial work and value proposition.
Owners widely praise the Straum Jan Mayen for its attractive, balanced design and impressive bracelet quality, noting its wearability and how well it "pops" in the sun. Reviewers highlight the gorgeous, textured dials inspired by Arctic landscapes and the Scandinavian design restraint, with a clean, legible layout. The watch is considered well-built, offering strong value and punching above its weight class. One owner finds the 12 o'clock marker uninspired and wishes for more purple on the gradient dial, while another notes the minute hand could extend further and the lack of on-the-fly bracelet adjustment. On balance, owners and reviewers rate the Straum Jan Mayen highly for its design and value proposition.
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