Additional Info

6600 s/n 3701-,6620 s/n -610300,7700 s/n 2801-,7720 s/n -610500 - 3300 (Lower Clean Grain & Upper / Lower Return Grain), 4400 (Lower Clean Grain & Upper / Lower Return Grain), 4420 (Lower Clean Grain & Upper / Lower Return Grain), 6600 (s/n 3701-later Upper / Lower Return Grain), 6601 (Upper / Lower Return Grain), 6602 (Upper / Lower Return Grain), 6620 (s/n 610300-later Upper / Lower Return Grain), 6622 (Upper Return Grain), 7700 (s/n 2801-later Upper / Lower Return Grain), 7701 (Upper / Lower Return Grain), 7721 (Upper Return Grain)