The Sweet Talker and the Super Hen were calls made in the early 70's (or thereabouts) when turkey hunting was just really starting to take off and hunters were trying to develop turkey calls for the emerging turkey hunting market. They were really a "second generation" pot call modeled as a variation of the Lynch Jet Slate.
They were adequate turkey calls for the time, but they are nowhere near the effective tools that todays turkey call makers are producing. The sound chambers of these calls were just not adequate to produce the volume, tone, and resonance that is needed to realistically produce the true sounds of the wild turkey.
Will they call turkeys? Sure they will. But unless someone is just looking to be nostalgic in their turkey hunting, these calls are mostly relegated to sitting on a call collectors shelf. I have a few of them myself, but when I go turkey hunting, I prefer to use a call that sounds more closely like a real wild turkey.