http://scard.buffnet.net/pages/signa...s/weapons.html
Drag down to the Ballard. It seems he really didn't make them but sold the rights to a number of manufacturers who produced the .44 for the war.
After the war civilian production took off in the mid 70's. I think by then Win. was starting it's clean sweep of the west.
The Maynard entry, I see, makes note of the wide flange.