,The aircraft you now have in South Africa is a Bf 109 E-3, W.Nr. 1289. It was flown by Uffz. Heinz Wolf and did indeed belong to 2./JG 26. Wolf made a forced landing in the back garden of Stocks Cottage in Udimore, Sussex, following an engine failure. He was unhurt.
You will notice that the aircraft, as displayed in South Africa, doesn't have a tail. This is because it was removed in England before the aircraft was shipped to SA and attached to another Bf 109, an E-1 W.Nr. 6313, which was shipped to the US.
6313 was missing its tail plane assembly because it had been removed and fitted to yet another Bf 109, W.Nr.4101, which was flown as DG200 of the RAF's Enemy Aircraft Flight.
It was a case of 'all change' for the tails of these three aircraft

They were all acquired by the British between 28th and 30th November 1940.
The honorary title 'Schlageter', represented by the gothic S in the shield, was given to a predecessor of JG 26, JG 132, on December 11th 1938. It was in memory of Albert Leo Schlageter who had blown up rail cars in protest at reparation payments imposed on Germany by the victorious WW1 allies. For this he was executed by a French firing squad on 26th May 1923.
Cheers
Steve