Lot 81404 – Spain – 1851 2r, a small lot of Sperati production materials for only the 1851 2r

1851 2r, a small lot of Sperati production materials for only the 1851 2r issue, comprising two trial exposures in deep vermilion on photographic paper with striking colour sampling also, two proofs on thin paper in the same radiant vermilion colour, also four trial proofs on paper in black and black-gray, one dated Dec 1937 with manufacturing notes at base; a unique range that provides a fascinating glimpse into the Sperati reproduction process.