Philately. Mi.6, Isabella II. FRANCO 5Cs vermilion red, issue from so-called. nachgravierte Platte; very fine, exp. Alberto and Enzo Diena, c.v.. 1.000EUR (Image 1) (Image 2) (Image)

Philately. Mi.291-303, envelope sent in Manila with overprint stamps AIR MAIL 1926 / MADRID MANILA; signs of age, however very rare issue; exp A. Diena,only as single stamps on cut-squares - 2.000EUR (Image 1) (Image 2) (Image)

Philately. I. FLIGHT / (service by American army) 6.NOV 1931 from CALUAG to DAET (province Camarines Norte), letter franked with American stamps for Philippines Mi.314, 316 and overprint LOF (London - Orient - Flight); very rare (Image 1) (Image 2) (Image)