The foam grills are usually rotten to particles by this time. If I remember correctly, the midranges will likely need re-foaming, as well as the woofers (same issue as the grills). If they are fully functional, they are a nice sounding speaker, and do not need too much power to drive. A 45 WPC amp or receiver will drive them nicely. I ran a set of these for many years.
Enjoy,
Rich P