, large even margins other sides, small thin in selvedge at extreme top right corner and tiny tone spot between DK and DL in no way detracting from this superb and fresh block. Rare. R.P.S. Certificate (1983). Ex Cooley. Photo in colour" /> Proof DK-EL, a glorious block of four from right of the sheet showing part inscription<I> "PRIC"</I>, large even margins other sides, small thin in selvedge at extreme top right corner and tiny tone spot between DK and DL in no way detracting from this superb and fresh block. Rare. R.P.S. Certificate (1983). Ex Cooley. Photo in colour | Christie's