Tapa dura
WRISTWATCHES ARMBANDUHEREN MONTRES-BRACELETS BRUNNER, GISBERT L. y PFEIFFER BELLI, CHRISTIAN
Tapa blanda
WRISTWATCHES: A HANDBOOK AND PRACTICE GUIDE BRUNNER, GISBERT L. y PFEIFFER BELLI, CHRISTIAN
Tapa dura
SWISS WRISTWATCHES: CHRONOLOGY OF WORLDWIDE SUCCESS BRUNNER, GILBERT y PFEIFFER BELLI, CHRISTIAN