What a find!
A Louis Armstrong Special model Henri Selmer Paris Trumpet, with original marked case and mouthpiece!
The trumpet has been loved by just the one owner before me, and I have never even played it as such (I can't play trumpet).
The valves and slides are all perfectly smooth.
On the centre valve casing, it is engraved "Balanced by Louis Armstrong".
The bell is marked with a number of things, Henri Selmer Grands Prix 1927 Barcelona etc.
Pics are here:
There is only one small ding close to the bell (easily repaired), otherwise this trumpet is in immaculate condition.
Recently a similar horn went for 1925 on eBay:
You can have this beautiful trumpet with the original Selmer accessories (Marked case which has number code locks and Selmer mouthpiece in immaculate condition) for 1800$ shipped.
Contact me if you need more pics, I'm planning to take some more anyway.