Listed a few more items. A vintage colour postcard of Sark (Channel Islands), colour postcard from Herm (Channel Islands) used with stamp from 1959, an official "On postal service" letter from Malawi, A "Periodical wrapper" from Sydney NSW, to London
that could not be delivered "Not known", a scarce mint postal stationery card from Yugoslavia and last but not least, a cover with SG 858 18p Gymnast, with "traffic lights" on the stamp margin. Why not take a look.