1855 DIE 2 PL.15 (GA GB GC) (SG21). A good to fine used STRIP OF THREE die II pl.15 S.C.16 (SG21) lettered GA GB GC cancelled neat London "37" Inland Office numerals. Centred to left but a RARE multiple which cats. £1950 as singles. RPS Cert. (Ref 83999).