Small French deck chronometer with 49h power reserve Circa 1860

Deck chronometer by Joseph Thaddäus Winnerl
–
A small French deck chronometer with 49-hour power reserve, circa 1860. Brass movement, ∅ 63 mm, chain and fusee, spring detent escapement according to Thomas Earnshaw, bimetallic chronometer balance with two weights, two gold screws and two platinum screws. Silvered dial with Roman hours, outer minute divisions, subsidiary seconds at 12 o’clock and power reserve indication at 6. Dial signed and numbered, movement numbered. Comes in a mahogany box with concealed key compartment.
–
Dimensions: 145 x 140 x 145 mm
–
Signed: Winnerl
–
Joseph Thaddeus Winnerl was born on January 25th, 1799 in Mureg/Styria. He served as an apprentice for Georg Schmidt Fidel in Graz and qualified in 1816. Beginning in 1823 Winnerl worked in Breslau and then for Kessels in Altona, for Urban Jurgensen in Copenhagen and from 1829 in Paris, where among others he worked for Breguet et fils. In 1831 he produced the first pocket watch with seconde independante (independent seconds). Its centrally positioned seconds hand could be stopped and then started again independently from the clockwork any number of times, however, after the completion of the timekeeping it would only slowly go back to zero. Only then could a new timing process be initiated. In 1832 he started his own business in Paris and produced marine chronometers, precision pocket watches and precision pendulum clocks. He died in Paris on January 27th, 1886.