Cool photos.
Those chairlift chairs are exactly the style they had at our local hill, Tyrol Basin, in the early 60's. They had the strange swing-around safety gates, and the truss-style towers just like in your picture. I've never seen that lift at any other ski area. They used to have this funny little guy (from Switzerland, IIRC) who'd come around every summer to service the lift.
PS wonder if the one on wheels in the picture is my donor?
What's the status? Had to go back a ways to find this. Any progress?