Giardinelli GEP-300 Series 3-valve euphonium. My child used this for three years in the school band. It was not marching band, only concert. She maintained this euphonium and always kept it in its case when not playing it. The euphonium was either at our home or at school. It still plays well and it’s in good condition. There are some small dings, which you can see in the video.