PL.37 DIE 2 RED-ORANGE (SPEC C9(2) TRANSITIONAL SHADE BLOCK OF FOUR ON COVER. 1857 envelope Edinburgh to Paris with a block of four 1857 die 2 1d pl.37 in a nice red-orange shade (Spec C9(2)lettered KK KL LK LL. Crease affects but tied several neat strikes of the Edinburgh "131/131" roller cancellation' on reverse good strike POSTED SINCE 7.20 LAST NIGHT date stamp AP 19 1857 (RA6). Envelope faults, but this shade much much scarcer than the paler transitional shades. (Ref 96308).