Got a box of books at auction 4/12 /12. Mostly reprints and a bunch of Iron Horse antique catalog from 1970's. To my complete surprize this copy of "Northern Plains Antique Wrenches & Tools" was in bottom of box. Anone know when this book was published ? Mentions prices are from 1975 auctions so it has to be later than that. Since author was one of the founders of the MVWC, I was very happy to find this sleeper.