Re: Cracks weldable on Pre war frame ?
i think it should weld up ok. the original frame's were brazed back then, so you might have to grind off all the brazing if it's in the way for the new weld. i'd bring it to someone who knows what they're doing and ask.
as Tom said, the cracks are in the bottom bracket shell, where the bearing cups press in. if they BB shell is stretched out and the cups fit loose, you could have the welder tack them in for you. shouldn't hurt it, and you're not gonna pedal much anyways, right?