I posted some poor quality digital pics of one or two of these a couple of years ago, but now that I've made some decent scans, I thought I'd post the whole set here for historical interest's sake.
These pictures are from the January, 1985 CES in Las Vegas, where Nintendo first showed their "proto-NES", the Advanced Video System . Only a few US print sources at the time bothered to mention Nintendo's booth, usually quite briefly, with few images available. However, in the April, 1985 issue of the pioneering Japanese game magazine Beep, they did a full report on the show, which included a visit to Nintendo's exhibit. Obviously, the third image down is the clearest display of the system in action, but look closely in the background of the first two, and you'll see the units lined up and being played by showgoers. As far as I know, these are the only extant pictures of Nintendo's display from this show, and of the AVS actually being operated.