Age determination and manufacturer observation watches 1935 - 1942 with movement numbers, Lange&Söhne, Dürrstein Glashütte, Assmann Glashütte
Lange & Söhne Caliber 43 Serial number 89641 - 93800 1937 - 1942 Quantity 500
Lange & Söhne Caliber 45 Serial number 39361 - 79320 1900 - 1925 Quantity 1216
Dürrstein/Glashütte Cal. 47 Serial number 99839 - 99890 1936 - 1939 Quantity: 46
Assmann/Glashütte Cal. 50 Serial number 89521 - 89955 1929 - 1938 Quantity 28
Lange & Söhne Caliber 57 I Serial numbers 81201 - 81209 1917 - 1918 Quantity 9
Lange & Söhne Caliber 57II Serial numbers 83191 - 83198 1935 Quantity 6
Source: Konrad Knirim "Military Timepieces"
