A few years later, the TOPSTONE RUBBER COMPANY, famous both then and now for it's line of inexpensive, but really cool Halloween monster masks, released their version of the Neanderthal Man -- The Caveman! Whether or not inspired by the B-movie, the Caveman is one of the most instantly recognizable -- and revered -- of the entire line.
This example is from an eBay auction. The seller was asking $499.99 for it. In this kind of shape it would be hard for a Topstone collector to turn down, IMHO.
The Caveman was seen in the back-page advertising of numerous monster magazines of the period. This ad is from a 1964 issue of Charlton Publications' HORROR MONSTERS.