Air Mail cover 1927 (12 Feb.) envelope flown on the first experimental flight from Jinja to Kisumu by Capt. Gladstone, annotated in red "By first/Uganda-Kenya/air mail", bearing 1922 5c., 15c. and 50c. and cancelled "AIR MAIL/1ST/UGANDA-SUDAN" double-ring d.s. in red. Very rare, one of only four carried. Photo