拍品專文
The watchmaker Ernest Duval was active in Geneva in the late 19th century. According to Swiss Timepiece Makers by Kathleen H. Pritchard, p. D-113, his name was imported by Edmond E. Robert, New York, in the early 20th century.
The combination of a one minute tourbillon and a duplex escapement, more commonly found in watches made for the Chinese market, is highly unusual.
The combination of a one minute tourbillon and a duplex escapement, more commonly found in watches made for the Chinese market, is highly unusual.