This is a very nice, gold brass, compensating double made by Hans Hoyer.
Unlacquered, with a hand hammered screw bell and a double stop valve, this horn can do everything that can be done on a full double (plus being able to hand stop without transposing is a real bonus!).
The horn would be a little on the heavy side for a young student, however it plays very well. This is a very good quality, German-made instrument for a really great price. It comes with a fabric screw bell gig bag.