Does anyone have a photo or advertisement of a M-H windmill?
I checked T. Lindsay Baker's Field Guide to American Windmills, and find no mention of M-H among 112 most popular US manufacturers listed. This is an excellent book with detailed illustrations and engineering design notes. However, it doesn't include manufacturers elsewhere in the world. Could it have been produced by a Canadian firm?
It seems a little odd to me that M-H would sell windmills and engines to power pumps and do other work. Although it's likely that some of the M-H dealers would have also sold windmills and pumps along with grinders, shellers, separators and such.
It also seems likely that a enterprising dealer would also have used windmills as a place to post advertising for his "big ticket line" - Massey Harris.