1913, 25 C. Airmail Lugano-Mendrisio, right unperforated, with 10 C. Postal stamp on piece, with flight confirmation stamp "POSTA AÉREA SVIZZERA LUGANO / 8 GIUG 1913", well perforated, above centered small tear, as a check soaked off and with hinge replaced, rare stamp, issued only 4.000 piece, photo expertize abbot SBPV, Michel 1.700.-