Very Interesting Graham, hope someone can explain why there are very few M-H 12-20's in Western Canada, have you found any Wallis 12-20's? it sounds like the larger 20-30 Wallis was the one most farmers bought.

For today's contribution to the M-H 12-20 thread here is a picture of the front cover of a hard back 80+ page book written in 1941 by H J Hine and published by Farmer and Stockbreeder (famous for their farming magazine) here in Great Britain, the book covers all aspects of the farm tractor of the period, including mechanical principles, operating and servicing procedures and trdae advertisements.
It is a lovely rear view photograph of a 12-20 ploughing with a three furrow M-H plough in typical ridge and furrow style.


Malcolm.