Yamaha B♭ Single French Horn YHR-321

This is a Yamaha YHR-321 B♭ single horn.
I received it about 8 years ago from a student who had used it for a long time, and I have been using it since then.
At the time I received it, the bell flare and bell body had been repaired for major dents, a hole in the mouth pipe had been reinforced with a patch, all rotors and slides were adjusted and soldered, so it is in full working order. The sound comes out from top to bottom. Considering its age, the airtightness is not as bad as it looks.
However, there are countless small dents and burn marks from soldering.
The case is the original one, and as a bonus, I will include a Yamaha 30C4 mouthpiece.