I was working in a ski shop in the late 50's into the mid 60s and while we didn't sell Plymold Skis, I do remember them. Not an especially popular ski, or even a ski one saw much. Seems to me they were sorta heavy feeling clunky things, but they were trying to make a new kind of ski. The bindings on the pictured Plymolds were a common type at that time, a "release" toe combined with a cable binding that would also release in a fall. The toe twisted out to either side and the cable released the heel in a forward fall, most often included a safety strap to keep the ski close after a fall. We used similar bindings on our rental skis, would send out almost 500 pair for Saturday and turned'em around for for the Sunday skiers. Lace up boots that weren't always dry when they went out Sunday.