I was a minute away from disc cutting the frame in half to take it to the tip. After much huffing and puffing and sweating I can now say it's a Swiss bottom bracket. I think the bearing cups will be okay, just need a new spindle and ball bearings.
Whew, good job - I went back and forth for weeks trying to get an old bb out of an alu frame (eventually successfully) but at least there was no question as to the threading!
I was a minute away from disc cutting the frame in half to take it to the tip. After much huffing and puffing and sweating I can now say it's a Swiss bottom bracket. I think the bearing cups will be okay, just need a new spindle and ball bearings.