Hi John
the rifle was custom build by Bennie Laubscher, a famous South African gunsmith, who has build some very nice custom rifles, mosthly on mauser actions. I am not a expert on his work, but we see some of his rifles that are up for sale in rare occasions.

Other Notes: Bennie Laubscher began making gun and rifle stocks as a hobby in the late 1980s, turning his attentions to riflemaking in 1995. As his reputation grew not only in his native South Africa but worldwide, so his company grew becoming B. Laubscher & Associates. He was joined by Johan Morkel and Danie Crouse, both gun and rifle makers, and Armin Winkler, an engraver. Today this flourishing company specialise in finest quality bolt-magazine rifles. The cost of a bespoke rifle being in the region of Ł6,000 with a guaranteed delivery time of one year from the date of the order, if not a little sooner. Please contact B. Laubscher & Associates by email assoc@blaubscher.co.za or by fax 0027 (0)21 8728373.

I manage to find this info online.