6,325 CHF
B. Haas & Cie., No. 15598, Swiss, circa 1890. Very rare, double face, moon phase astronomical, keyless minute repeating, watch movement with perpetual calendar, wound by opening and closing the cover. Notes B. Haas invented a perpetual calendar mechanism, Patent No. 2870 from September 30, 1872 and a form of winding where the mainspring was wound by opening the front cover of a hunting cased watch. Patent 3945 from December 2, 1873. ( Patent /or Inventions. Abridgements of .Sjaecifi(atiotts. Class 139, Watches, Clocks and Olhe> !'zntekeeJees. His Majesty's Stationery Office, London, 1905.). A watch of this type was sold by Antiquorum in April 1992, lot No. 215.
Auctioneer:
Antiquorum
Date:
1998-10-31
