Lot 51108 – 1931-33, Irish Acceptances for Imperial Airways services to Burma group of 12 covers + 3 unused covers

1931-33, Irish Acceptances for Imperial Airways services to Burma, group of 12 covers incl. 1931 (Apr 4) experimental first flight London-Rangoon, 1933 (Sep 23) Imperial Airways letter about the weekly London-Rangoon service and 10 Imperial Airways covers sent on this day as well as 3 unused, Imperial Airways leaflet and two 1933 (Oct 2) return flight covers (one sent registered from Thanbyuzayat and one with franking tied by the special violet cachet), useful group