Have never seen one of these heads,all that were in the area were center throat heads.have a 15ft.1859 on a410 and a18ft.1859 on a 510,both factory floaters,both diesel machines.also have an offset 43 corn head,works on 410 but 510 is to wide,will knock corn down with ladder side. have old 422 corn head,been shedded,very good,any interestIJIJ to good to junk!