Highly interesting silver lever German navy watch Circa 1941

Silver open faced lever pocket watch
–
A very early and highly interesting German silver open faced, first series, lever pocket watch made for the German navy, circa 1941. Precision lever movement, caliber 48 with fine regulation. Silvered dial with Arabic numerals, power reserve indication, subsidiary seconds and blued steel hands. Plain case, hinged covers, made by Andreas Huber Munich-Berlin. Comes with Extract of the Archives. Movement signed and numbered.
–
Diameter: 60 mm
–
Weight: 173 gr.
–
Signed: Lange & Söhne Glashütte