This sterling pin is of the national flower of South Africa, the King Protea. It is hallmarked on the back with a Springbok head. I am not sure how old it is, who made it or if it was awarded to some society or sportsmen.
Jannie
Some update. The Springbok head is the sterling mark for Republic of South Africa(after 1961). The Union of South Africa was a leopard/lion head in a U.
Jannie