Book on Horology. Saunier, Claudius. Treatise on Modern Horology in Theory and Practice. Translated from the French... by Julien Tripplin... and Edward Rigg.London, J.Tripplin, n.d. [c.1881, this translation first published in parts 1878-1881]. 21 folding engraved plates with partial hand-colouring, numerous diagrams in text, xvi,844pp., intermittent spotting/foxing to text, thick 4to., publisher's green cloth gilt. Some light rubbing to tips and spine edges, and inner hinges neatly strengthened.First published in France in 1861. This is the first translation into English.