Joe: I doubt if there were more than a handfull and maybe only one or two. As you probably know they were used to promote plows in the fall of 1966. When they introduced the 1750 to the dealers in the late summer-early fall of 1966 they took us out on a tour of a farm where they were working a 1950 FWA against a 5020 (5010?) Then they had a purple 1850 come out from behind a "baracade " with a new plow. After they brought it up to where the dealers were they talked about the new high speed (Speedx) bottoms which were introduced at that time. They also had a contest for the dealers to name the bottom. As you may know, Speed-x was not new to as Cockshutt had used the name before that. My son has my slides and I still may have a picture I took of the purple 1850 with the plow. Does't help much does it. John