My guess is pre '85, before that I'm even less sure 
If you are old enough and your memory is good enough you may remember that it was all about "Made in Mexico" in the 70s and early 80s.
I gave up on this a while ago, I have been running Chinese truck and trailer bearings for over 15 years to my knowledge and probably more than 5 years before that without my knowledge.
In reality Timken and Barden are no better, just more expensive.
I don't think Chinese bearings are any more likely to explode on the highway than anything made in {pick a country}.
"Made in USA" typically means "ASSEMBLED in USA"
The parts that are "Assembled" and you may think worth worrying about will come from wherever the "American" manufacturing company's purchasing agent can get the best deal.
BTW - - "New Holland" tractors - some of them are/were Iseki under the hood, I'm not current on where TN65 are made (where the major components are assembled) but I would guess South Korea with a fair amount of Ch*n*s* components.
If you are old enough and your memory is good enough you may remember that it was all about "Made in Mexico" in the 70s and early 80s.
I gave up on this a while ago, I have been running Chinese truck and trailer bearings for over 15 years to my knowledge and probably more than 5 years before that without my knowledge.
In reality Timken and Barden are no better, just more expensive.
I don't think Chinese bearings are any more likely to explode on the highway than anything made in {pick a country}.
"Made in USA" typically means "ASSEMBLED in USA"
The parts that are "Assembled" and you may think worth worrying about will come from wherever the "American" manufacturing company's purchasing agent can get the best deal.
BTW - - "New Holland" tractors - some of them are/were Iseki under the hood, I'm not current on where TN65 are made (where the major components are assembled) but I would guess South Korea with a fair amount of Ch*n*s* components.