Falkland Is SG142b 1935 Silver Jubilee 1/- Short Extra Flagstaff on Cover

1935 (31 Dec.) envelope from Port Stanley to England bearing full set 1/- showing variety short extra flagstaff cancelled by despatch c.d.s. a fine Last Day Cover. S.G. 142b (600 pounds as a used stamp). Ex Caerynn November 2017