The first day covers – a postage stamp on a post card or stamped envelope franked on the first day the issue is authorized for use within the country or territory of the stamp-issuing authority – are particularly interesting and appeal to me as a designer. I also like how most of the addresses (not actually addressed to either of my grandparents – must find out who C.A. Marsters Esq. is or was) are clearly typed on a typewriter.
I realise a lot of these are pretty wonky – my poor scanning skills.
These pages of the world stamp album were very difficult to scan, so I only did a few.