unused -- 3p. on 9p. ultramarine with characters 16mm. long, variety surcharge double, fine mint; scarce, R.P.S. Certificate (1961). S.G. 124b, £400. Photo

细节
unused -- 3p. on 9p. ultramarine with characters 16mm. long, variety surcharge double, fine mint; scarce, R.P.S. Certificate (1961). S.G. 124b, £400. Photo