While I'm at it, there is the tinplate-era size started by Lionel they termed "Standard Gauge" (2-1/8"). While toys made in that size are not considered scale models, a few hardy souls produced finescale trains in that gauge...
built to a scale of 7/16" to the foot, mostly in brass. They were very expensive when they were offered in the 1930s, which of course was still in the grip of the Great Depression.
