In their next sale, Wellington Auctions are advertising a possible incomplete single clasp QSA with SA02 clasp.
What is interesting is their description of the clasp as the King's bar. I hadn't ever noticed that description before.
Queens South Africa Medal, bar South Africa 1902. 391 SERGT. J. HART, K.R.R.C. Copy Rolls 4th Battalion King's Royal Rifle Corps shows entitlement to bars for Orange Free State (crossed through) & South Africa 1901 (all 4th Btn. crossed through) & 1902. Very unusual Queen's Medal with King's bar only. Entitled I.G.S. bar N.E. Frontier 1891. Contact marks, Nearly very fine