There are 2 questions here. Neither of which is very important except as a curiosity:
1st: has anybody ever heard of the TYLER bicycle. It was made in Poland. Looks exactly like the vintage Raleigh 3 speeds --but cheaper parts.
2nd: Why would anyone weld a fixed cup? This doesn't look like an original weld. My guess is that it might have had right hand threads and kept working itself loose.
BTW, this welded cup is on the TYLER.
Any other ideas?