Testing My Valve Trombone after a Repair. Interesting Instrument in Bb OR C!

I bought this while in college and have not played it since I graduated. It needed a repair, and now that it's fixed I was quickly giving it a quick test. I didn't have a good mouthpiece with me. It works much better with a 6-1/2AL, but I had a Wick 4BS.
I'm playing 2 pieces:
1. Hummel Trumpet Concerto in Eb, movement 3
2. The opening part of "Morning Has Broken"

[@TheMrAshley2010]

Such a nice sound!...AND intonation!!!

[@WuLuft]

Such an elegant voice, awesome 🎉

[@terryturner261]

Very nice, gorgeous sound

[@lotsabirds]

Im guessing made in the 1920s or 30s! Is it a True Tone! It sounds great!

[@tantinoburatino]

What kind of composition are you performing?

[@dwerden]

First piece was from the Hummel Trumpet Concert (3rd movement) and the second was Morning Has Broken.