49,560 CHF
“Equation of Time “Marchant” & Sidereal Time Deck Watch – Patent Stromgren og Olsen” Alexandre Huning, Geneve, No. 54343, patent Stromgren og Olsen, No.541. Made circa 1920. Very fine and extremely rare, silver, keyless deck lever chronometer designed for astronomical navigation, with indications for Equation of Time and Sidereal Time as per Danish patent No. 22822 of 1918. Four-body, “bassine”, massive, polished. Hinged silver cuvette. White enamel with outer minutes and Equation of Time track with Arabic five minute numerals, subsidiary dials for the hours at 9 with radial Roman numerals, 24-Sidereal time hours dial at 3, seconds at 6. Gold hour, seconds and minute hand with sun terminal, blued steel “Breguet” equation hand and “spade” 24-hour hand. 45 mm., 20’’’, frosted gilt, 17 jewels, wolf’s tooth winding, straightline lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, swan-neck micrometer regulator. Case stamped with Alexandre Huning’s trademark “AH, Geneve”, dial signed “Patent Stromgren og Olsen, No.541”. Diam. 60 mm. Notes Watches with Equation of Time are extremely rare, especially with this type of Equation of Time display, the equation hand is concentric with the minute hand. As opposed to most watches with equation of time, on which the difference between the mean time and the solar time is only shown on a sector, giving the number of minutes that must be withdrawn or added to the solar time to find the mean time, in
Auctioneer:
Antiquorum
Date:
2006-11-12
