Hello Rolf, that is a nice find as the Biederman is very rare!
Does this truck still exsist?
Who was the manafacturer of the crane?
I know of Thew, Lorain and Quickway but perhaps there were more.
I wil post a few pictures found on the internet.
First one is a Biederman.
Source:
www.autogallery.org.ru
With best regards,
Bertus.