I remember the Kansas City Worldcon in 1976, in a Star Wars display room when they were still selling the movie and nobody had ever heard of it.
There was a full-size C3-PO on display, along with Darth Vader’s suit, a lot of cool props, and McQuarrie’s paintings everywhere.
On a stool nearby sat an eager young blonde guy, no older than me, telling us about the movie and handing out typewritten photocopied press releases on a single sheet of bright yellow paper.
I still have a couple of those faded yellow press sheets, and maybe they still have a few of Mark Hamill’s fingerprints on them.