Its the standard straw chopper. It has 28 rotating knives and 21 stationary knives. You can also put in a fine cut chopper which has 63 rotating knives and 20 stationary knives. I take it since you have not seen this before you have beaters in the combines?
Sorry parts, yes it is a chopper at closer inspection. It looks a little different to the 88 choppers - this one has more of a reinforcement between the blades than on 21/2300 series. At first it looked like you could bolt something else between the knives. We have plenty of choppers here in Aus. The 70/8010's i've seen have only had beaters in though. I have actually fitted about 8 chopper kits to 88's. Silly me for not realising it was a normal chopper - it was the reinforcement between the blades that threw me.