I've been in contact with someone who wants some model wagon wheels scale 1.75in to the foot. when I queried this, he said it was to match 3.5in gauge rolling stock. Does anyone know the origin of all the apparently odd, model railway gauges. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.