This vintage Armstrong tenor saxophone, model "31," is in good playing shape and will need some minor adjustment to play low B and Bb a little more effortlessly. It plays with a strong voice very easily until the low C.

It is in great structural shape and doesn't have any major issues or past repairs.

It is used and vintage and as such has some very minor dings and scratches (see pics).

With a minor visit to a tech you can get a vintage tenor sax (with well functioning modern-style keywork) for a very low price.

To me this looks like a Keilwerth stencil but haven't found anything concrete online to support this.

Let me know if more pics are needed.