My original tumblr post was here. This image was researched by Bacchus at ErosBlog as part of the “Δ commission.” The research was originally published at Hedonix as “Δ 047 – Deathray Trail.” Here is what Bacchus found.
This is not an actual movie poster but is rather (according to the artist) one of artist Mike Mitchell’s first gallery pieces. He writes:
Deathray Trail.
This was one of my very first gallery show pieces ever! When I lived in Madison, WI in 2007 I was asked to be in a show where we took old movie lobby cards and painted over them. I did two. It was a neat idea, but in the end hardly anyone showed up. I still sold a couple prints, but the curator disappeared shortly after and never paid anyone or returned their leftover work. Ohhhhhh art.
The artist’s web site is here, with a gallery where the artwork also appears.
Sadly, there seems to be no information available on which lobby cart was painted over. There also seems to be no discoverable information that any actual “Deathray Trail” movie ever existed, so it probably did not.
Having scrutinised the credits box, the lobby card is most likely from “Mark of the Apache” (1957), as it appears to be the only production common to “Chuck Connors”, “Susan Cummings” & “Lisa Montell”
“Mark of the Apache” was originally titled “Tomahawk Trail” and a search for lobby cards for that title yielded this link to the original card – http://www.emovieposter.com/gallery/inc/archive_image.php?id=5383110
the Robot was originally Chuck Connors as a Union sergeant.