I recently purchased a Buescher 400 trumpet off ebay. It's serial number dates it to 1959 or there abouts. It was completely redone with an Anderson Plating valve job. I have only played it for a couple of days and the jury is still out for me. It plays smoky like in the lower register and very bright in the high register. There does seem to be some vagueness on slotting. I was wondering if any one else has played a horn like this and their experience with it. I was wondering if a valve alignment would help the slotting issue or it this is just one of the things this horn was known for.