This is a vintage Conn 12M "Naked Lady" baritone sax, serial number 339031. This sax has a unique look, with a nickel plated body and lacquered keys. This is a good example of an early 12M with straight tone holes. With new pads, it's playing great.
As you can see in the pictures, this bari definitely has a unique look to it. It was nickel plated, and reengraved with the original naked lady engraving. It is in near perfect physical condition, with no major dents and no evident resolders.
A "normal" 12M is usually a very punchy horn, and nickel plating makes this one even more aggressive. It is very powerful, and the bottom end on this sax is just huge. It is a fantastic player in all registers.