It is entirely possible it is German but it issued before the rise of the Third Reich as it was 1933 and it is post Imperial Germany or it would carry an Imperial motif however it does use a very German style to the cross as you can see from this picture of a Bavarian 40 year Faithful Civil Service Medal.
My guess would be that it is a German or Austrian civilian marksman medal of some type, given that it is a fairly substantial medal I would guess that it is provincial/state level medal.