Signaturen/Atteste:

u.a. gefunden auf "Steamer 5 centimes green, four singles (transfer types 4,2,3,2) all with good to clear margins, except corner of one stamp barely touched, with distinctive pen strokes on envelope with full content, vertical filing fold, from Kantara to Monsieur Gérard, Agent d'Affaires, Port Said, reverse with cogwheel cancellation "PORT SAID 15 AUG EGYPTE" of the French Post Office, signed Ap. N. Gennaropoulo in red on reverse and certificate Holcombe (1991) and RPSL (2007). A truly magnificent franking of these rarities on cover, of which only two other similar frankings have been recorded, one of them is placed in the Ringström Philatelic Museum Provenance: ex Royal Collection of Queen Elizabeth II The Chihangir Collection (Corinphila 2000) illustrated and desribed in Ringstrom and Tester, Part 3, p. 93 (letter no. 16)." bzw. auch https://corinphila.ch/en/_auctions/&action=showLot&auctionID=8&lotno=5691#