This is a pair of Transvaal 1885 Stamps, SG 190 and 191, the HALVE AND TWEE PENNY IN RED ON 6d Black-Brown.  A pretty and very early example of Transvaal/South Africa Postage.  These are the RARE Provisional Overprints!

These little beauties here are in Mint Very Fine Condition with Original Gum.  They are valued at L101 in the Stanley Gibbons Catalogue!