I thought I'd start off with something I discovered lurking in the back of my filing cabinet today. A very crumpled and aged dummy for the first issue of The Mighty World of Marvel. I'd originally rescued this from certain doom while I was working at Marvel UK in Kentish Town, sometime in 1983 (I think). We were planning an office move to a far more more salubrious location in Bayswater and we were all told to jettison anything that wasn't needed to save on removal crates. Anyhow, somewhere along the line I saw this sticking out of a pile of rubbish along with a few other things and being the incessant hoarder that I am, I saved it and it's been deprived of daylight up until this very day. Interestingly, there were a couple of other pages alongside it. One is an advertisement with editor's corrections. But curiously, it says The Wonderful World of Marvel, leading me to speculate as to whether that was the comic's originally proposed title.
The published issue (spot the differences).
The Advertisement including 'The Wonderful World of Marvel' and author's corrections.