I'd say the Marx is about 1:43-1:56. I've been hunting for an online example myself. Closest I came was the Cowgirl from the set.(white plastic is the key for faster visual searches) It's on a couple sites, but that's a few among a ton of small sites. I only recall I was lead to one or two pages via Thor's Trains/Toy Soldiers or one of the Marx tin train id sites. I haven't stumbled across/ recalled the fate of my own Highlander yet.