**UPDATE** Thanks to a fellow board member, (Hi Mark) who emailed me the following Ebay auction, (see link below) depicting an ad from a magazine showing the item inside. It's actually much older than originally thought. The magazine is dated 1955. Scratch the hanging from a tree scenario though. Looks like it would have been on a free standing bracket of some sort.
Thanks, Tony
http://cgi.ebay.com/Doughboy-Strike-...mZ390072354564