Sandner flares are the standard in the professional horn making market. You've probably heard his bells without knowing it as most of the boutique and high end shops use his flares. The 87 has tapers that are similar to a Geyer/Schmidt style horn.
This one is made of unlacquered yellow brass and other than a couple of tiny (and I mean tiny!) dings it's in great condition. The ring is Lawson/Alexander compatible.