JI Case 610B Has Been Good to Me
Model Year: 1955
Decent power, rated 39 hp, good range of speeds. Mine has the Case-o-Matic, Hi-Lo range transmission. Used it as my primary haying tractor for a number of years. It is now mainly in the yard moving hay and clearing snow. I built a 3-pt.h. for it and added a canopy. Parts are getting harder to find but it owes me nothing.
Pros: Good power, decent hydraulics.
Cons: Case-o-matic transmission can be temperamental.