Le Spiral Reglant et le Balancier depuis Huygens jusqu'a nos jours. Illustre de 117 cliches et documents divers.

Lausanne: Editions du Journal suisse d'Horlogerie, 1945. Softbound. Small quarto, paper covers, 117 pp., b/w photos, drawings and diagrams, lacking the free-front endpaper. Good. Item #88053

Text is in French.

Price: $150.00

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