Thriftmaster was the "Standard Equipment" Stovebolt Six of the day.
Previous to '36 it was a 194 and later a 207/208 (can't remember when they changed it.)
From '36-'53 (or '54), it was a 216.
After '53 or '54 (can't remember) it was the 235.
In the "Art Deco" (Liberty/Victory) series and the early Advance Design series, the Loadmaster was a Babbit-Pounding, Splash-Oiling 235. I can't remember how far back that went, but it was probably into the late thirties. I think.
