NEGRETTI, G. & P. De VECCHI. Patek Philippe. Complicated wrist watches. (1999). Fol. Ocl. w. dust-j. -- D. THOMPSON. Watches. The Brit. Mus. (2008). Sm-4°. Obrds. w. dust-j. -- G.L. BRUNNER & C. PFEIFFER-BELLI. Wristwatches, Armbanduhren, montres-bracelets. (1999). 4°. Ocl. w. dust-j. -- E. JAQUET, A. CHAPUIS, (a.o.). Technique & history of the Swiss watch. (1970). 4°. Ocl. (Spine faded). -- And 4 o. (8).