JohnDThompson - I suspect you may be onto something.... At best, I would recommend pulling out the fork and try to examine it by shining a light up the bottom of the headtube and through the hole that would normally be in the head tube. If one sees the edge of the tube or a surface that looks like the inside of a lug, then I would crush the frame and recycle it. But if one sees what looks like the inside of the downtube going pretty much up to the headtube, then it it is probably ok and the theory of a welded/cobbled up lug gains ground. A clever person might find a friend with one of those snake "inspection" tools like they sell at a hardware store. It would give a better view inside. If there is no hole in the headtube then I guess one could put the Dremel tool to work but it would be easy to get too much invested in this frame which look pretty low quality to start with (poor filing, etc).