Some great new content for you, many thanks to Geraldine for emailing. Over to her:
"My husband, Charley Lippincott, worked for Dino.
I wanted to send you a jpg of a poster which Al Williamson did for Flash Gordon's Cannes' marketing.
Dino had Charley make up a poster so they could put it on the walls of the Cannes Festival -- which is also a big film market. Charley was friends with Al, so he asked Al to do it"
And what a poster it is:
That's not all - she also sent this concept art for the rocket cycle (abandoned in favour of the gym treadmill design in the final cut) by none other than legendary 70s space illustration master Chris Foss!!