Mars Model-115 Military.
See Tell (and Mars) catalogue (mid-late 1930s German)
These rifles have been for sale on eGun, the German auction site.

Mars Model-115 Military (post-WW2, by August Bebel Werk)
With thanks to Eberhard.
He says:
When the German Democratic Republic finally took control of the Haenel company from the Russians in 1952 it was given the official name “Ernst Thälmann Werk” (ETW)... In Zella Mehlis... the August Bebel Werk, was making Mars air rifles, namely the Mars models 100 and 115, although relatively few examples of the model 100 were made. Both models were intended for export and for military training of the "FDJ" (Free German Youth). The FDJ rifles had no markings whatsoever, whereas the Mars export air rifles were marked "Aug.Bebel Werke Zella Mehlis", with the relevant model designations "Mars 100" or "Mars 115".
For a detailed description of the postwar East German airgun scene, see also:
Mars Model-115 Military 1st variant
With thanks to Eberhard.
https://www.vintageairgunsgallery.com/images/2025/04/28/29819b08a9e58681723df47b0d20404c.jpe








































































