SOUTHERN RHODESIA. Cover is a registered airmail letter posted in Salisbury on 21 FEB 66 using 'invalid' independence Overprint stamps. Cchrt 34a gives the reason for the surcharge. it has been incorrectly surcharged 1/3d (cachet illeguble), shown paid with GB postge due labels. The correct surcharge is singel deficienvy of the airmail letter rate 1/3d+ 1/- registration fee = 2/3d. There was much confusin during both surcharge pefiods as  to  how registerd mail should be surcharged. This cover also illustrated the use of loyalty tags (refer to page 13) the image of Prime Minister Ian Smith against a backdrop of the iconic Victoria Falls.