My first valve of my trumpet will not go all the way down, I can't

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Could this be Louis Armstrong's Trumpet? Found in a Vegas estate of one of his friends/associates in 50s/60s, engraved L.A. on mouthpiece. Letter from him to owner but horn not mentioned—looking for

How To Fix a Stuck 2nd Valve: Pushed In Slide

Is the inside of my first valve supposed to pop out like that? It's been sticking and I'm wondering if they are related. : r/trumpet

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How to Clean a Cornet or Trumpet–

How to Clean a Cornet or Trumpet–

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How to get a trumpet's valves unstuck if you haven't played the trumpet in years? I tried valve oil and two valves would not move and one valve is stuck in the

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