Max Armstrong shares the story of a 1968 Allis-Chalmers D-21, that will go on sale at the Iowa Premier Auction with Mecum Auctions, Nov. 9 and 10, the auction starts Nov. 8. Learn more at mecum.com.

Max's Tractor Shed is a regular feature of This Week in Agribusiness. If you have a tractor story you'd like to share for this feature, contact Max at [email protected]