1931 REGISTERED MAIL BRACKNELL TO USA. Envelope sent registered mail Bracknell to Pennsylvania, USA with KGV ½d (SG418) and 4d (SG424) cancelled BRACKNELL/BERKS 28 FE 31. BRACKNELL registered label and privately produced label "This package contains postage stamps not subject to customs duty. May be opened for inspection by customs authorities." (Ref 102931).