I bought a bassoon a while back, and I dont know what company it is made by. There is nowhere that it has a bassoon manufacturer. The only markings are under the butt on the back side on the left it has a 3 and on the right it has 624 (both of them are upside down). Thank you.

It's impossibe to say without some pictures - many makers have produced instruments for stores & dealers & these sometimes don't get stamped. If you able to tke some, put them on line somewhere (Flickr etc) & send a link it might be possible to identify it. Or send some in an email to me.