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I often wonder where these sellers get their information. I doubt if it left the factory as it appears. That horn has several incorrect braces and appears to have had some obvious repairs.

98% feedback is all you need to know.
As if Conn kept an overstock 20J for 50 years, though whatever factory moves, and then gave it to a random eBayer with piss performance.

Get out the Wright's brass polish and see how it cleans up.