Ba111od Chapter Delta 9 Two-tone 40mm

9 TWO-TONE Ba111od Chapter Delta 9 Two-Tone 40mm

Technical specifications:
Swiss Made automatic movement
Base Soprod M100
BA111OD manufacture module 09310 with hypocycloidal time display

Power reserve: 42 hours

316L stainless steel case with yellow gold PVD two-tone finish
Diameter: 40 mm
Transparent case back

Multi-level steel dial with integrated triangular architecture

Domed sapphire crystal with anti-reflective treatment

Crown positioned at 4 o’clock engraved with BA111OD emblem

Functions: Hours – Minutes – Date

Water resistance: 5 ATM

Quick strap exchange system

Description:
The Ba111od Chapter Delta 9 Two-Tone 40mm merges horological innovation with timeless elegance through a refined two-tone construction combining stainless steel and yellow gold PVD coating.

This model features the revolutionary CHPTR_Δ manufacture complication, BA111OD’s first in-house time display concept. Instead of a traditional rotating hand, a satellite hour wheel “rolls” around a fixed central wheel.

When one wheel rotates around another, it generates a mathematical cycloid. In this collection, BA111OD uses a deltoid hypocycloid (ratio 1/3), resulting in the tip of the hour hand tracing a perfect triangle. This asymmetrical time display represents a world premiere in contemporary watchmaking.

Developed in collaboration with renowned watchmaker Olivier Mory, the hypocycloidal system transforms time reading into a dynamic architectural experience.

Inside, a Swiss automatic movement based on the Soprod M100, enhanced by the BA111OD manufacture module 09310, delivers this sophisticated mechanism with a 42-hour power reserve.

The 40 mm 316L stainless steel case with yellow gold PVD accents creates a refined contrast between classic luxury and modern design. The transparent case back reveals part of its mechanical architecture.

Protected by a domed sapphire crystal with anti-reflective treatment, the watch ensures clarity and durability.

The Chapter Delta 9 Two-Tone blends Swiss mechanical innovation, geometric time architecture and contemporary elegance, offering a distinctive interpretation of modern luxury.