This is a Yamaha signature model, designed by Mark Gould (former principal player of the Metropolitan Opera Orchestra). I purchased this used. It was excellent in terms of playability and tone, especially on the C trumpet. The body is silver-plated, and the rim is gold-plated, but the gold plating on the rim is quite thin. There is a feeling of use as it is a used item. There are no dents on the rim or shank. Especially for those who play in orchestras, how about it? The following is quoted from the product page: ---------------------------- The cup shape and inner rim diameter are similar to the standard series 17B4 model, offering a familiar playing feel and high operability. Compared to the 17B4, the throat diameter is designed to be larger, achieving a broad sound, and is highly popular among orchestra players. Specifications ・Series: Signature TR-MG (TR-GOULD) Series ・Compatible instruments: Trumpet ・Inner rim diameter: 17.30mm ・Rim counter: Semi-flat ・Rim thickness: Standard ・Cup depth: Slightly shallow ・Throat diameter: 3.88mm ・Backbore: Standard ・Finish: Silver-plated (Rim: Gold-plated)