Originally Posted by
jlhmnj
I'll venture a wild guess. The center support looks like something off a Sears Minnesota from 1910 or so. Google Sears Minnesota and view Images. If this isn't it I'd do the same with other makers from this time period but it might just be Sears. Also the bases vary from year to year even by the same makers. Hope this helps.
Jon
I'll have to go research. It would be interesting, seeing as I have a Minnesota B treadle head in my sewing room. Now if I could only find a crank that work on it!