Prospective purchasers are advised that several countries prohibit the importation of property containing materials from endangered species, including but not limited to coral, ivory and tortoiseshell. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country.
Sotheby's, New York, 6 & 7 June 1990, Important Watches, Wristwatches and Clocks, lot 576.
The present watch is prominently described and illustrated in Patek Philippe Complicated Wrist Watches by Giampiero Negretti & Paolo de Vecchi, pp. 48 - 51.