Lot 51123 – 1931 (Dec 9) Irish acceptance for Imperial Airways Christmas airmail service London-Southern Africa, pair of covers

1931 (Dec 9) Irish acceptance for Imperial Airways Christmas airmail service London-Southern Africa, pair of covers with GB KGV 1 1/2d booklet panes, one “INDIA-RUBBER INLAID SPONGE…”, other “Cash’s WASHING RIBBONS…”, both on 1/2d postal stationery envelopes with Dun Laoghaire paquebot cds, sent to Tanganyika with Mbeya and Dodoma arrival bs repsectively, fine and attractive pair