Profile: Jean-Pierre Hagmann, Case Maker Extraordinaire and a Legend in His Own Time | SJX Watches
BIVER Watches : Les Montres de Jean-Claude Biver et son Fils
No. 1 Platinum minute repeating perpetual calendar wristwatch with moon phases and case made by Jean-Pierre Hagmann Circa 1987 | Important Watches: Part II | 2021 | Sotheby's
Blancpain Jean-Pierre — Les Allemands au Chili (1816-1945) - Persée