While there is no proof that this came from the camp, documentation that came with the estate (photocopies only) state that this is where it came from.  Bid accordingly.  Otherwise ... a very fine 1930s era microscope, complete with carrying case.  Manufactured by a US company in Cincinnati, which was common even for labs operating in Europe.  The company, Wocher & Son, was very well known for precision instruments, which this is.