I had two pairs of Caber race boots in 1974. One was similar to a Heschung boot without the goofy buckle system but with a stitched sole. The got too soft early in the season and even bolstering them with fiberglass didn't help so much.
So Caber sent me a pair that were single-piece molded in what may as well have been concrete. They were great and skied very well.
Does anyone have a photo of either of these boots from back when the earth was cooling.