CHPTR_Δ.5 [LABEL NOIR] Limited Edition
CHPTR_Δ.5 [LABEL NOIR] Limited Edition
CHPTR_Δ.5 [LABEL NOIR] Limited Edition
CHPTR_Δ.5 [LABEL NOIR] Limited Edition

CHPTR_Δ.5 [LABEL NOIR] Limited Edition

Regular priceCHF 2,950.00
  • Swiss Made
Limited Edition to 111 pieces / Delivery September

Limited Edition to 111 pieces 

BA111OD collaborates with Label Noir to introduce the CHPTR_Δ.5 Label Noir Limited Edition, limited to 111 numbered pieces. This exclusive timepiece features a deep black design with glossy and matte finishes, highlighted by vibrant green accents. The unique display combines circular minutes with hypocycloidal hours, transforming time reading into a choreographic experience.

Thomas Baillod, founder of BA111OD, praises the collaboration: "Emmanuel Curti's innovative approach aligns with our vision of horology, resulting in a truly unique watch." This exclusive series is set to captivate watch enthusiasts with its bold design.

Rather than simply rotating a hand around a central axis, the movement was designed to "roll" a satellite hour wheel around a fixed central hour wheel. When a wheel is rotated around another wheel, the trajectory described by any point on this satellite wheel is a cycloid. There are several types of cycloids: in this BA111OD chapter, the chosen cycloid is a deltoid (with a ratio of 1/3), and as a result, the trajectory described by the tip of the hour hand is... a triangle.


List of compatible watchbands : Bracelets – BA111OD

  • Free worldwide shipping
  • Free return within 14 days
  • 2 Years international warranty

Automatic Swiss Made movement enhanced with BA111OD manufacture module 09310 with hypocycloidal time reading (base: Soprod M100)

42 hours

Stainless steel 316L anti-allergic with black PVD treatment, 44mm
Transparent caseback

Satin matte steel with multiple levels and laser engraving
Faceted triangle in polished steel with black PVD treatment, green dot

Domed sapphire crystal with antireflection treatment, NFC technology

At 4 o'clock, engraved with the BA111OD emblem

Hour-Minute, date at 2 o’clock


Black textile strap with green stitching
Deployant clasp
Easy-clip system

Available options:
• Credit Card (VISA, MasterCard, American Express)
• Direct bank transfer in 1x or 2x with no interests
• Apple Pay / Google Pay / Shop Pay Express checkout
• Twint (Switzerland)

For deliveries to USA, Canada and UK, please note that taxes will be due upon delivery.

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Developed and produced with the help of the highly renowned watchmaker from La Chaux-de-Fonds, Olivier Mory, CHPTR_Δ (pronounced Chapter Delta) brings a duality between the circular time of the minutes and the hypocycloidal time of the hours, enclosed in a triangle, in the foreground of the dial. This asymmetrical reading of time, which slows down and starts again, like a choreography, is part of another temporality, symbolizing the carousel of life.

A connected glass

Together with all models of Chapter 4, all our CHPTR_Δ models include the NFC technology in their glass. A first in the industry!

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