PL.20 (GG GH HG HH)(SPEC C6) BLOCK OF FOUR. A good to fine used block of four 1855 die 2 1d pl.20 lettered GG GH HG HH with good to fine perforations although some creasing on revers. Block cancelled two strikes of "159" numeral of Glasgow. Very scarce multiple from this scarcer plate. (Ref 107775).