In 2001, German luxury house Goldpfeil embarked on one of the more unusual collaborative projects of the early independent-watchmaking era, inviting seven members of the Académie Horlogère des Créateurs Indépendants (AHCI) to create watches for its Seven Masters collection. Among them was Vianney Halter, already developing the unconventional visual language that would make him one of the defining independent watchmakers of his generation. His contribution, the ref. GPVH, was produced in a reported edition of 108 pieces and transformed the familiar rectangular wristwatch into something altogether more mechanical and architectural.

Halter took inspiration from vintage rangefinder cameras, a theme carried through virtually every component. The 40mm by 29mm 18K white gold case is covered with hundreds of hand-hammered micro-dimples intended to evoke the leather covering of an old camera, while the crown recalls a winding knob. Two apertures display the jumping hours and geometric moon phase, complemented by an arrow-shaped central minute hand and central seconds. Inside is the automatic 35-jewel calibre GUB 60, developed by Halter for the project, with a sophisticated moon-phase mechanism calculated to deviate by only one day in 139 years.

The Seven Masters project captures an important moment when independent watchmaking was still an intimate and highly experimental corner of the industry. Vianney Halter's contribution is unmistakably his, being mechanically serious, deliberately unconventional and built around an inspiration extending far beyond conventional watch design. With its camera-derived architecture, jumping hours and exceptionally precise moon phase, the GPVH is a fascinating early example of the imagination that would come to define Halter's work.