Ratxipt, yup I know that tractor didn't sound exactly like a hit 'n miss engine but it also doesn't quite sound like the engine in the last You Tube video you gave a link to. The open crankcase Loyal that you posted a link to doesn't exactly sound like the tractor engine either but it's getting much closer than my guess at a hit 'n miss engine.
What I'm most astonished at is the low idle/running speed of the engine in that model tractor.
By the way, this video link didn't want to work for me: http://www.youtube.com/watch?v=KwH5_jKTKd
I love antique engines too!
Any one else out there who can help us?