just found your conversation about the nicholson iron works, after googleing the name. I found an old seed rill in the corner of a field, while on a walk near Hungarton in Leicestershire, and this had the nicholson of newark name cast on the wheel. I would say that the drill was about 100 years old and horse drawn. I hope this is of interest toyou, as you can see i am interested in farm machinery myself. belarusman