Select model catalog: 688 Rotary Harvesting Unit (s.n. 051300-103953) (North American Edition) PC4316 Attachments for Rotary Harvesting Unit 684, 686, 688 (North American Edition) PC4366 688 Rotary Harvesting Unit (s.n. -051299) PC4294 688 Rotary Harvesting Unit (North America Edition)(S.N. 103954 - ) PC4441