SWALLOW FORMOSA Trumpet with Swallow Yamaha 11C4 This listing is for a Swallow trumpet and a Yamaha mouthpiece "11C4". It is a used item as shown in the photos, with some dirt due to aging. I am a beginner with musical instruments, but I tried playing it lightly using the method I researched, and it didn't seem to be broken. When shipping, I will pack it with bubble wrap and unnecessary cardboard.