Pierres Holding

Pierres Holding SA was a watch group within ASUAG focused on functional jewels ("Pierres"). Pierres Holding was active from the 1960s through 1983 and was based in Bienne and for a time was headed by Pierre Renggli.

Pierres Holding SA was formed in the 1960s to bring together watch jewel technology suppliers within ASUAG. It was structured as a general holding company with four key "centers" based on geography:

• Centre La Chaux-de-Fonds
  • Méroz Pierres, La Chaux-de-Fonds
  • Munari, Le Landeron
  • Tanner, Le Landeron
  • Micropietra, Meina Italy
  • Krugel, Travers
  • Jaman, Saint-Sulpice
  • S. Kohler, La Chaux-de-Fonds
  • R. Audemars Fils, Lugano (1970-July 1, 1978, sold to the Audemars family) - Specialty jewels and components
• Centre Les Brenets
  • Seitz, Les Brenets and Granges
  • Rochat Frères, Les Charbonnières
  • Dépraz, Le Brassus
  • Thomae, Cugy
• Centre Pieterlen
  • Litos, Pieterlen
  • Flück, Pieterlen
  • Lüthy, Pieterlen
  • Cramatte, Courtemaîche
• Centre Thoune
  • Watch Stones Co., Thoune
  • Baechler, Bienne
  • Romelli, Balerna
  • Rubistar, Thoune