This is the final design model, designed by Nippon Kangakki Co., Ltd., which became the foundation of Yamaha's wind instrument division after its merger with Yamaha in 1970. The "TR-2" (renumbered to TR-231 in 1967), which appeared in 1967 as a younger sibling to the "Imperial," a legendary Japanese-made trumpet whose popularity has not waned since its production began by Nikkan in 1965, shares many parts with the Imperial while offering a cost-effective trumpet with only the essential functions needed for performance. Even though the functions are limited, it features nickel silver outer pipes on each slide, two-piece valve casings, brass valve guides, and other specifications that are still used in high-end instruments today. In the Atelier Custom, we have implemented a pitch correction function during performance and customized it so that it can be used without hesitation in modern ensembles. Currently, it is only available in the upper grades of each manufacturer, with an M bore that provides moderate resistance and a tight blowing feel. It is easy to control, has excellent projection, and a bright sound. ★Customization Overview ■ The 1st slide has been rebuilt to a reverse configuration, and a thumb hook for pitch control has been installed. This also reduces the attenuation of sound caused by directly gripping the valve casing. ■ A finger ring, which was an option at the time, has been installed on the 3rd slide, allowing for pitch correction of Low C# and Low D. ■ A stopper has been installed to prevent the 3rd slide from falling out. This eliminates the possibility of denting the crook due to the slide falling. ★Condition ■ With little use, the lacquer finish, piston valves, and slides are in excellent condition for a playing trumpet. ■ Hand lapping has been performed to make the 1st and 3rd slides, which were originally inoperable, operable. ■ This is a used item, and there are scratches and minor dents. ■ The lacquer remains at approximately 80% or more, but the bell opening is unlacquered. ★Items for Sale ■ Trumpet body ■ Mouthpiece ■ Case (original) ★Inst. Trading is a trumpet custom workshop and not a reseller.