No way to tell who the maker was. After the war the Germanicon and Austrian gunsmiths could only work on ailed personal guns. They could neither own or work on any other guns, this was true until 1952 when Germans were again allowed to own firearms. IMO most of the post war German 1903 conversions are dismal at best, this one is above average. Wien is Vienna. The German 1903's before the war are a different thing altogether, they made some fine custom sporters.