Wow! A Eureka Easy-Glide in real life! I've only seen the groovy advertising post-card with the mod/hip lady using it on an orange shag rug in her bachelorette pad. Very Mary Tyler Moore. I say early 1970's, maybe late 1960's. This was Eureka's answer to GE's electric carpet sweeper - the disposable bag is located right in the base. Probably did a pretty good job on surface litter since the air path is so short. I mean, the bag is right behind the brush roll!