Limited edition automatic self winding antique pocket watch august von loehr.175
EXTREMELY RARE PATENT AUTOMATIC ANTIQUE POCKET WATCH WITH POWER RESERVE !!!
Unique : The watch is automatic but you can wind also with a key !!!
*** LIMITED EDITION OF ONLY 250 in all the world !!!
This is number 175 !!!
AUGUST VON LOEHR PERPETUAL PATEND SELF-WINDING !!!
CIRCA 1880 ( 144 YEARS OLD !!!)
* Case: VERY BEAUTIFUL ENGRAVED CASE in silver 935 !!!, signed dome, entirely chiseled and engraved with floral motifs. four-body, NUMBERED 175 !!! ECXELLENT CONDITION !!!
* Dial: white enamel, Roman numerals, minute track, subsidiary dials for small seconds and power reserve, pear hands. small crack and hairline not easy to see.
* Movement: key-winding and with hammer shaped weight for the self-winding, lateral lever escapement, cut compensated bimetallic balance with screws, flat hairspring. Very good condition.
working, no key
Size about: 48 mm X 4 mm
AUGUST VON LOEHR:
Invented a self-winding pocket watch in 1875, for which he received German patent number 1903 on January 10, 1878.
In 1878, von Loehr registered an English patent for a pocket watch movement with automatic winding via a pendulum oscillating mass.
He had pocket watches with this movement manufactured by the London company Selfwinding Watch Co.
Two housing designs were used: round and square. The latter was made by the Swiss watch company Hahn Frères & Cie. made in Landeron. Von Loehr's pocket watch was the only automatic watch of this type that achieved a certain level of distribution.
Around 4,000 of the round version were manufactured and sold and only 500 squares !!!!!
Von Loehr had the elevator and the housing bracket protected by patents DE 1903, DE 3939, DE 14939, GB 1473 (1880), GB 4781 (1880) in Germany and England.
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