Large German silver open faced lever watch with chain Circa 1920

Silver Glashütte watch 
–
A large silver open faced Glashütte manual wind pocket watch with chain made by A. Lange & Söhne, circa 1920. The lever movement with a DUF caliber. White enamel dial with Roman hour numerals, an outer minute track, sunk subsidiary seconds at 6 o’clock and blued spade & whip hands. A plain case. Dial signed, case and movement with matching numbers. Comes with a silver watch chain weighing 34 g. and a length of approximately 24.5 cm.
–
Diameter: 59 mm
–
Weight: 141 g
–
Signed: Deutsche Uhrenfabrikation Glashütte i/SA A. Lange & Söhne
–
DUF stands for Direct Upward Force. This is a function that prevents the timepiece from being damaged by impact.