Yesterday, I noticed that there was a crack about halfway around the top tube, where it meets the seat tube, on my 1939 Viking (or Columbia, or a couple other brands, I think, built by Westfield). (Note: I'm not putting anything on the seller on this. He has been extremely helpful with all of the challenges I have dealt with this bike. I only just noticed the crack after spending plenty of time cleaning and polishing the bike, so I am sure that he didn't see it. )
I'm looking for thoughts as to what to do. I ride all my bikes, so it needs to be rideable. Further, I'd like to keep it as original as possible.
I see several options:
1. Do nothing. If it gets worse, address it then.
2. Be proactive and use some sort of strong epoxy.
3. Be proactive and have it welded.
I appreciate any thoughts or other options that I might consider.