1893/1924 (ca.), interesting unused and used collection of Sperati proofs, trials and forgeries, including 1863 15c. blue proof pair with A and B type frames, dated "6/4/51" in manuscript by Sperati, Mi. B83, used, B83K with inverted overprint, used, B91K with inverted overprint, used, B131II, used, B.L.P. overprint proof in block format, 5l. brown and red-brown without inscription in bottom tablet, each as a working color proof with additional printed notes on bottom, further Naples with three trial exposures, Levant 20c. with forged "ESTERO" overprint, San Marino 1892 62c. Sperati II, Plate D (2), unused, etc., on four pages
