375rd Heinrich Köhler auction - Day 1

1890/94, single page with 3 finished reproductions, 2 unique overprint proofs and 5 BPA card proofs, the surcharge proofs and reproduction were first reported and illustrated in Plate A of Sperati II, all except the card proofs are ex Carl Walske collection. Also included, but not mounted, is a genuine 5a surcharge from Sperati stockbook that apparently served as the model for Sperati's image used to make the forgery