This trumpet was made by Hirsbrunner in Sumiswald, Switzerland around 1800 to 1825. It is a G circular trumpet made of brass with an F crook, lead pipe, and mouthpiece. This compressed trumpet model, known as a stopftrompete, has a tuning slide in the center of the coil similar to a cor d’orchestre of the period.
The Hirsbrunner firm was founded by Christian Hirsbrunner in the late 18th century. The company continued with Hirsbrunner family members and still makes musical instruments to this day.