Important Watches, Antiquorum, 1990
Fina Watches and Wristwatches, Sothebys, 2004
Longines, Legendary Watches, Antiquorum, 1994
The Pocket Watch Handbook
Clocks, John Hunter
Uhren. Kennen - Restaurieren - Pflegen
Die Armbanduhr. Zeit am Handgelenk
Die Geschichte der Uhr
Wear due to age and use.