Lot 80808 – 1852 50 baj, Sperati reproduction elements for the finished reproduction

1852 50 baj, Sperati reproduction elements for the finished reproduction, comprising three paper trials, with one in a dark blue-grey with coloured border around, with manuscript dating May and June 1924, also a paper with two mute diamond cancellation trials and extensive technical notations and Sprat’s fingerprint colour trials, dated July 1943. A wonderful group of four elements towards the production of the finished stamp with the correct cancellation.