A. Lange & Söhne Glashütte i/SA, Movement No. 61403, Case No. 61403, 53 mm, 103 g, circa 1917 A fine Glashuette pocket watch with independent jumping seconds mechanism "seconde morte", sold in 1917 for the sum of 767 Marks - manufactured in quality 1A...

A. Lange & Söhne Glashütte i/SA, Movement No. 61403, Case No. 61403, 53 mm, 103 g, circa 1917 A fine Glashuette pocket watch with independent jumping seconds mechanism "seconde morte", sold in 1917 for the sum of 767 Marks - manufactured in quality 1A Case: 18k gold, case design "Royal". Dial: enamel. Movm.: 3/4 plate movement, applied "seconde morte"-mechanism, gold screw compensation balance. Jumping seconds mechanism or "seconde morte" Lange felt that the readability of the jumping auxiliary seconds was not satisfactory in a pocket watch, so he started following another course. By 1867 he had designed a mechanism which allowed an independent large central seconds hand to jump every second. The hand had a stop device but could not be reset to zero. 1877 his sons filed a patent for a slightly modified version of A. Lange's mechanism (no. 182). This seconds mechanism on a 3/4 plate created a precision watch which had the indication system of an astronomical pendulum clock but was portable. Source: Reinhard Meis "A. Lange & Söhne" published by Callwey, Munich 1997, p. 238. Case: very good, a dent. Dial: very good. Movm.: very good, capable of running, cleaning recommended.