Watch List notes:

Great Britain, Queen Elizabeth II Issues, 1971-96 Decimal Machins, Ordinary paper 50p. ochre-brown, vertical strip of five, the first three completely imperforate, the fourth partly imperforate, unmounted mint, a fe tiny coloured marks on the gum; fine. S.G. X992a, £875 (for a pair)..

Estimate: £200.00 - £250.00