73,600 HKD
Stromgren Og Olsen, Cornelius Knudsen, Kobenhavn, No. 559, circa 1915. Fine and rare silver lever keyless pocket chronometer, indicating both solar mean time and sideral time, as per the German patent No. 283094 dated February 25th 1914 and the Swiss patent No. 73312, dated February 16th, 1915. Four body, massive, "bassine et filets " , polished. Hinged silver cuvette. White enamel with outer Arabic minute ring, sunk subsidiary dials with Roman numerals for the 12 mean time hours, Arabic chapters for the 24 sideral time hours and the seconds. Blued steel and gold hands. Notes According to the patent registred by Elis StrOmgren and Jens Olsen, this chronometer was invented so that astronomers would not have to convert mean time into solar time for their observations. A similar watch was sold by Antiquorum, Hong Kong, May 1989, lot No. 324.
Auctioneer:
Antiquorum
Date:
1997-06-09
