There were two models that were manufactured between 1971 - 1973. The SX-190 for SWL and the AX-190 for the HAM bands. Cost about $250 new in 1971. As you can see this one has had some of the mods done to it. It's working great and it has a Heathkit HS-24 external speaker with it.
I sure do love it when non-radio friends have something they don't want, don't like, or don't appreciate and they give it to me!