used  (1d.) slate-blue with good margins and mainly lightly cancelled "1", fine. R.P.S. Certificate (1958). Sc. 11; S.G. 18, £650. Photo
used (1d.) slate-blue with good margins and mainly lightly cancelled "1", fine. R.P.S. Certificate (1958). Sc. 11; S.G. 18, £650. Photo

細節
used (1d.) slate-blue with good margins and mainly lightly cancelled "1", fine. R.P.S. Certificate (1958). Sc. 11; S.G. 18, £650. Photo