Lol! They reminded me of Pac-Man, which is why I picked them up. Surprisingly great shape, almost new, even have the plastic carry case (also yellow). They are uncomfortable as all hell... It's a Soundlite HR-6 AM radio headset, but I've removed the guts and replaced it with a small 1w bluetooth Rx/amp combo, wired it up to existing switches and knobs, replaced tuner with a pot, and swapped nasty paper drivers for Koss RTXpro drivers (I suppose same as the Portapro's, just titanium coated) , just for fun. They sound.... well, horrendous. LOL
Even nuttier is my Panasonic RF-60 AM/FM headset, you look like marvin the martian when wearing it. Weighs like 5 pounds, almost solid metal, aerials that reach 4 foot high, it's nuts. If I ever come across a mint condition one, I'm snapping it up. They're really, really hard to come by.