Was a dealer thing and in the 1960's and latter the comitition for sales wes fearce.
We lived 9 miles from two towns one north and one south and a north western one about 11 miles and a west one 12 miles away.
The town north of us had JD's don't know how the dealer was but there just were not a lot of JD's on farms in the area and he was one of the first to xclose up shop. the north west town had a dealer that sold Fords and Allises. they are still in bussiness today selling New holland and what ever the Allis line has morfed into. You can find a lot of Fords and Allises in the area still. The town south of us had a Allis dealer, Coop, case, moline and silver king dealer. Lots of all those brands in the area but the silver king dealer folded in the late 1950's, coop was next to fold up about the mid 50's then the really pold owners of the case dealer sold out and the new owners didn't make it but about a year or two. the Allis and Moline dealer stayed till the bitter end for moline and the Allis dealer retired and closed his shop.
My dad a strong Massey Harris man switched to Allises aas soon as he caught a bunch of flack from my mom. You could not send a woman to that place to buy parts. The owner was the most fowl mothed critter I ever knew. Not much in the way of Masseys in the area either.
IH was a storng dealer in the area is still in bussiness today but sells and Jap ornge tractor instead. the dealer ship was out in the country on a cross roads. Story has it the guy farmed with IH products and decided to seel them when the IH dealer nearest to him was closeing shop.
Good dealers drove the crappy dealers out of bussiness. My dad said once My blood is red and I perfur my tractors the same but can not and will not do bussiness with a disrectful person.

Al