Rhodesia 1966 5/- Churchill with Offset Overprint Doubling

1966 5/- on 1/3d Churchill (SG 373var). VF/UM corner pair, left stamp with additional OFFSETTED KISS PRINT (mirror image) of portion overprint (bars and 5/-), the right stamp with QUEEN'S FOREHEAD FLAW. Exceedingly interesting frontal offset of the overprint, first such seen by us.