We had one in 1050 on our farm in North Dakota it was a 17 with a 12 foot platform. It had a continental engine. We pulled it with a Case DC4. good machineYes it is a M-H 15 or 17, Dad had an engine driven 15 when I was a youngster and I spent many an hour riding on the platform above the motor. We had both the pickup and straight cut attachments for it and it was nearly a days work to change over. It involved adjusting a great long double spring under the hitch to balance the table and one had to dig a hole in the ground to get clearence to swing the wrench. We must remember that many tractors of that era didn't have PTO's, we pulled ours with a Twin City KTA. Some machines were galvanized but ours was painted. The one in the picture has the Scour-Kleen attachment but the straw spreader is missing. They were a good reliable machine and put out a nice clean grain sample. The only problem with ours was the engine magneto gave problems and it was very difficult to remove and reinstall. I thought ours had a Continental engine ..but that was a long time ago and I could be wrong.. Massey tractors of that vintage used Continentals..