35-40. Provisional issue, 1934. Forged surcharges: Mercer Bristow, “Surcharges are tempting targets for many fakers”, Stamp Collector, Vol. 74 (October 23, 2000): 69. Forged surcharge on the 2.55 l: Ernest A. Kehr, “The 1934 7 1937 second printing Vatican Provisionals”, Opinions IV: Philatelic Expertizing – An Inside View, (The Philatelic Foundation, N.Y., N.Y., 1987): 232-236.
C33a. 500Lire, 1960, perf.14. Fake made by re-perforating the gauge 131⁄2 stamp (Scott 33): Mercer Bristow, “Vatican airmail has room for tampering”, Stamp Collector, Vol. 72 (May 4, 1998): 12.