Close call,,,,,,,if you look at the bottom thread area you will see the little slot that the base thread fits into, most cheapo repro handles i have seen don't have this, the bottom thread just sits snug to the wider part of the handle and does not fit up into the wood. But saying that some very good copies do, depends on how far the manufacturer want to go with the reproduction i gues. It does show traces of glue so it has been worked. if the top collar comes of a picc of the under neath would be good. do you have any other info on where it cam from ?
Regards , Nick