I have a 4 string with no name on it. It has a picture of a dutch style windmill painted on it (I think) up at the tuning keys. The back of the neck comes to more of a point as opposed to the concave shape of todays guitars. I have no doubt it is old. Its in descent shape and has a beautifull tone to it but it needs some repair at the tuning keys. What is it and where do I get parts?