Attached is foto of the first so called "Double Decker ski.
It was produced by Clement Ski in 3 Rivers Quebec in the 1950s.
It was laminated wood with a wooden ridge attached by aluminum straps
front and aft and an aluminum girdle under the boot area.
The skier shown is Ernie McCulloch who was a top racer of the era.
The ski had 2 versions in various lengths. One version had a single groove
flat bottom, the other version was "hollowground", that is the bottom was concave from edge to edge.
The latter version was used by McCulloch. I skied on the flat bottom version and can
only imagine what the hollowground one skied like.