essay 1850 first issue design essays of the 1Sch. printed in black with green Eagle coloured overlay, also 1Sch. and 2Sch. proofs in issued colours with greyish-black Eagle coloured overlay, also "HERZOGTH.HOLSTEIN" oval design imperforate proofs of the 1865 (Nov.) 1¼Sch. in purple and 1865-66 2Sch. in ultramarine. (5)