Falkland Is SG142a 1935 Silver Jubilee 1/- Extra Flagstaff on Cover

1935 (Nov.) envelope from South Georgia locally addressed bearing full set 1/- showing variety extra flagstaff cancelled by despatch c.d.s. Fine and a very rare variety on cover. S.G. 142a (2500 pounds as a used stamp). One of only just 94 possible from the august 1935 third printing.