"Penny", fresh and well-centred; the odd split perf. and one with tiny surface fault. A rare multiple. R.P.S.Certificate (1958). S.G. 16, £1,800+++. Photo" /> unused Block of Four An unused block of four with one stamp showing "comma" like stop after<I> "Penny"</I>, fresh and well-centred; the odd split perf. and one with tiny surface fault. A rare multiple. R.P.S.Certificate (1958). S.G. 16, £1,800+++. Photo | Christie's