Published in Spring 1989 Zeiss Historica Journal
Author: Nicholas Grossman
See Page 10 – 11.
The author traces the basic amateur telescope (a 60 mm Asegur) from the early 1900s to the postwar period where it was noted as the Telementor in East Germany (The West German Zeiss did not resume manufacture of amateur telescopes after World War II). An interesting aspect is the valuation of the telescope when compared to the same purchase price as a bar of an ounce of gold at equal dates.
To go to the Journal itself, click on the year 1989 in the first line above.