Jamaica SG116a 1935 Silver Jubilee 6d Extra Flagstaff on Cover

1935 (21 Dec.) Selfridge & Co. Ltd. envelope registered from Kingston to London bearing the set of four with 6d. showing variety extra flagstaff each neatly cancelled with oval registered datestamp leaving the variety clear. S.G. 116a (275 pounds as a used stamp). Ex Caerynn November 2017