Did you know there's a forum dedicated specifically to vintage detectors only? Here it is:
Vintage Metal Detector Forum
If you scroll back through the years of posts, you can see a lot of pix of others. Some oddities, some short-lived, some long-lived, etc..... I find the earlier '60s varieties especially interesting. When I started in the mid '70s, there were still a few guys with some 66tr's, etc.... (circa late 1960s) still around. But by the later '70s, pretty much everyone was evolving and had dumped the older dinasours.