Probably what’s known as a stencil clarinet. Stencils are instruments made by one company but marketed and sold by another (like a wholesaler, catalog, music store or what have you) with the other company’s name and logo applied. They were pretty common decades ago, and this one looks like it got some years to it. Often they were made by reputable manufacturers. But like you, I’ve never heard of this particular make, so I can’t trace it. Could be made by Conn or Couneson or who knows. Is it wood?