I was unaware of that ad campaign and only located a December 1, 1974, newspaper ad in several newspapers with it. Another creative and informative marketing message by Eureka! Great memory!
It's similar to the carpet critters ad campaign that Eureka used about six years later; although that one lasted longer.
Here's the ad featuring models 1255, 736, and 2042. The first photo is an enlargement of the clip art and messaging, and the second is the full advertisement: