Ok for whats worth, here are my 2 cents, Back in the 70s ,we had a local tv repair shop, the guy had a booming business, selling new color sets. He did verry little repair work on old BW sets and old color sets. The old sets some how couldnt be repaired
. if the customer, wouldnt buy a new set, the guy would sabotage the old one
one of his favorite tricks was to take a small straight pin, like for sewing, clip off the head, and.......
push it in the tight windings of the yolk, shorting it out. what an ahole
I had a philco that he worked?? on, looked very similar to your pix.