Orange Free State 1900 VRI SG112 ½d Blocks, Diff Ovpts

1900 VRI ½d on ½d orange (SG 112&123var). Pair of VF/UM blocks of four in distinctly differing shades: light orange and intense orange, the latter block with very bold overprint and the variety THICK "V" on top left stamp. Interesting illustration of the different settings concomitant.