I bought one new in 1975.The platform was injection molded ABS plastic.I don't know if you guys remember how that stand was designed to be put up in the tree,but you hooked a chain around the tree,with the platform flat against the tree trunk.The chain ran through several short pieces of plastic pipe which acted as rollers.
There was a sectional,aluminum pole that you hooked underneath the platform and it was used to slide the platform up the trunk of a tree.There could be no limbs.
Now,off the front of the platform was a rope ladder-poly rope and oak rungs.The trick was to use the pole to slide the platform up the tree trunk till it was at the height you wanted it,then pull down the front of the platform,by pulling the rope ladder.
The platform had 2 tubular braces angling down from the front of the platform and where they met at the tree trunk,they had 2 flat metal points that bit into the tree.
Now that yor treestand is erected,you just climbed the rope ladder.It was kind of a Tarzan act.I was in the best shape of my life then and it was a little bit of a feat then,to get up that swinging rope ladder.It was noisy getting that thing up a tree too.
As crazy as that setup was,when you got that platform locked in position,it was like standing on a concrete slab.It was totally rigid,no squeaks and felt very strong.Not a bad hang on stand if you threw away the rope ladder and the aluminum pole and then used tree steps to get up the tree.
It is dangerous for me to trust memory but I am pretty sure that was 1975 and that I bought it the first year they came out.I believe the entire setup weighed 14 or 14.5 lbs.I don't know how long they were sold.Probably not long.I must have given mine away.I hope the person is still alive.
I sure wish I had a picture of it or better yet,a video of the whole process.It had to be a sight to behold.Despite all the noise and commotion putting it up,I did kill a few deer from it and quite a ways from the truck.
Oh,and forgot to mention,the top surface had little,pointed cones molded into it so your feet wouldn't slip if the platform was wet.The cones were maybe 1/8" high and actually worked.
I wish