ZAMson
^Has PhD in Disc-Artistry
I wouldn't bet my life on it, but to the best of my knowledge, Quest's the Odyssey was the first two piece disc... saw those years before I'd even heard of MVP.
Don't even bet an Odyssey on it. AMF Voit had overmolds in the 80s, and I personally think the Buzzbee (70s) is a closer relative to the Odysseys and Nova/Atlas than MVP's in terms of construction.