This is a yearly presentation given by Gary Agrimson, and Arland Lepper

Sit back and relax as you listen to Roto baler and All-Crop History Walk-
from beginning to 22:46 is the history presentation of the roto baler

22:46 is the start of the combine history

Click on the following link to learn about this history presentation

 https://www.youtube.com/watch?v=CkWHc8uI7-A

This seminar is 51 minutes and 39 seconds long