The toyline known as Billy Blastoff incorporated several versions of a four-inch tall, plastic, child-faced adventurer produced by Eldon in the late 60's and early 70's. The concept appears to have been licensed from Tomy by Eldon for distribution in the US, Canada and Europe. Billy Blastoff was sometimes packaged as a deluxe Space Set with his friend Robbie Robot (Robbie was also featured in his own packaged set). Billy and Robbie could be purchases separately or packaged with equipment in different Action Sets.
Vehicles made for the figures were powered by a gear beneath the figures' pack which also held "AA" batteries. The battery pack could also power several figure-held accessores such as a Radar Scope, Space Gun and underwater light via jack and corded plug.
Some carded accessory packs were marketed in Europe, and possibly Canada and the US in limited regions.
Eldon also produces some additional Billy Blastoff "spin-off" products including a bubble-blowing plastic pistol called the Billy Blastoff Bubble Popper and the Billy Blastoff board game.
What's it worth? Take a look at this Billy Blastoff price guide: sold listings for a value indication.