BA111OD CHPTR_Δ.8vsBA111OD CHPTR_Δ [MDP] 40mm
![CHPTR_Δ [MDP] 40mm](/_next/image?url=%2Fimages%2Fwatches%2Fba111od--chptr_delta-mdp-40mm.png%3Fv%3D1790514488786&w=1536&q=60)
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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.

CHPTR_Δ.8
![BA111OD CHPTR_Δ [MDP] 40mm at true scale](/_next/image?url=%2Fimages%2Fwatches%2Fba111od--chptr_delta-mdp-40mm.png%3Fv%3D1790514488786&w=1536&q=60)
CHPTR_Δ [MDP] 40mm
Diameter
40mm
40mm
Thickness
n/a
12.9mm
Water Resistance
50m
50m
Power Reserve
42h
42h
MSRP
$4,100
$4,100
Movement
Soprod M100
Soprod M100
Case
3 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The BA111OD CHPTR_Δ.8 is widely praised for its avant-garde design and exceptional value, with owners noting its ability to deliver a luxury experience at a competitive price. Its unique hypocycloidal time display, developed with Olivier Mory and utilizing an in-house module based on the Soprod M100 movement, is a significant draw. Reviewers highlight the modern sector dial and the technically complex Swiss luxury watch offering for under €3,000. Some find the 41mm case and 12.75mm thickness larger than expected for a dress-style watch. Overall, owners and reviewers rate the BA111OD CHPTR_Δ.8 highly for its innovative time display and remarkable value proposition.
The BA111OD CHPTR_Δ [MDP] 40mm is widely praised for its exceptional value, offering a unique hypocycloidal time display typically seen on much more expensive timepieces. Owners and reviewers highlight the captivating dial design and the technical Swiss luxury at a price point under €3,000 or $2,620. The 40mm case size is noted as a welcome reduction, maintaining manageable dimensions with a 10.5mm thickness and 47mm lug-to-lug. The Soprod M100 automatic movement is present. Overall, owners and reviewers rate the BA111OD CHPTR_Δ [MDP] 40mm highly for its innovative time display and strong value proposition.
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