This is a Berkeley Wind E♭/D trumpet. While it's inferior in quality to instruments from famous manufacturers, it has been customized to be reasonably playable. Here are the main modifications: ① Because the pitch drops in the winter even with all slides in, a cornet mouthpiece with a trumpet adapter was used, resulting in a shorter mouthpiece to stabilize the pitch. ② The 1st, 2nd, and 3rd slides are tuned to E♭, so custom rings were made by cutting clear files. When using the D tuning, inserting the rings into the 1st and 3rd slides makes the pitch correct. For the 2nd slide, a 2mm gap is ideal. There are lacquer stains on the bell, but overall, it's in good condition with no dents. ↓ Performance videos https://youtube.com/shorts/IylAOj78GAA?si=sbF4KOwIVuE7h9dZ https://youtube.com/shorts/NpeEkpYcDgA?si=jrSEzuFKk6yTkmsK The mouthpiece (for cornet + adapter) and the original case are included. The case can also be used as a backpack.