Is the eagle the post 1939 type or the stylized eagle adopted by the 1st proof rules? As I recall the 1939 rules would not allow the 0.318" chambering so the rifle would date between 1910 & 1938, unless there was a reproof. Mike Ford notes an Herr Wolf from Bad Kissingen that was keen on adjustable cheekpieces on rifle stocks. His stock making factory was sourced by the larger concerns. He was active in the 1970s.

When in South Africa was it used?

Kind Regards,

Raimey
rse