Jokari's popularity in England in the early 1950's spread to South Africa. David Tilley was kind enough to send me much information on the game there. His family was involved its production until 1954 when they returned to England and the company was sold to Dunlop.
These gentlemen are the father and grandfather, respectively, of David Tilley, who provided all the information here on the history of Jokari in South Africa.
Sport Trader & Exporter - July 1950
London Evening Standard - October 16, 1950
Sunday Tribune - October 29, 1950
Johannesburg Sunday Express - November 26, 1950
Sunday Tribune - December 17, 1950
Sussex Daily News - February 3, 1951
Dunlop Sports News - Circa 1950
Below are from unknown sources, Circa 1950