In the ‘72 to ‘74 time frame the shop I worked for imported a number of Bob Jackson frames.
I owned one that was purchased there.
Great chrome and paint.
seat tube needed dressing.
The bottom bracket... mine was one of the many that the bottom bracket we suspected had been distorted in a vise while being built.
It required chasing the threads and facing the ends.
over 1mm required to be removed to be anywhere close to having the fixed cup Seat with 300 degrees of engagement.