I’m not sure what brand, but based on the top valve caps, I’m thinking late Buescher, Selmer, or the like. Serial number is 546,xxx. It had been painted silver

most of which has been removed, the lacquer finish is pretty much gone as well. 3rd slide looks to be a replacement (with unequal length legs (shorter one looks to have been cut)).
The plating on the pistons is worn a bit at the ends but looks okay in the middle where the ports are. All slides move alright, as do the pistons. Finger buttons are not original but do match each other. The I’d of the 2nd slide looks to be .730”.
$100 plus shipping by USPS from 92382 (Southern California).

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