I replaced my coll a year ago. I tested the coil resistance with an ohm meter. I got 1.8 ohms. They should be 3.0 to 3.2 ohms resistance. So, I take it, my “new” coil is already junk. Although there are parts readily available for these 80+ year old tractors, the new parts are junk, and the only ones manufacturing these parts is China.
Getting a bit tired and disgusted with the parts available being crap.