Philatelic Envelope - Help!

Philatelic envelope featuring an image of Europe/San Marino
Postage stamp: C. Corr. Pacchi Milano 7.12.965.18
Two stamps from the 7th Stamp Day, December 5, 1965, featuring a map of Italy with the “Autostrada del Sole” highlighted
Image of the Beatles aòbum 'Help!'
Envelope addressed to Societè Imar, Balya, Turkey