Lot 50990 – 1890-95 4a Grey SPERATI FORGERY, photo-litho forgery in the form of a die proof on wove paper

1890-95 4a Grey SPERATI FORGERY, photo-litho forgery in the form of a die proof on wove paper (ca.42x60mm), signed in pencil by Sperati below, reverse with BPA « SPERATI REPRODUCTION » hs numbered « 58, very rare in this form, with only a cut-down stamp-size example present in the Sir Gwaine Baillie collection