Dutchy, a beauty to admire!   Having spent years in the MidWest, working for NorthrupKing Seed Co, I had the opportunity to visit many farms and see many vintage tractors, still working the fields.  I saw a number of A,B, and M models.  I gotta say though, I never saw one with a single wheel on the front.  The MN model had a single wheel (the N designated "Narrow") but the B is a new one on me.  Great work and terrific detail from "the master".