Yes, I an sure it is "saved wax." I found the instructions for it in the International Sculpture Conference of 1972 or 1974. I have the book somewhere...
It is the most revolutionary casting technique that almost no one has ever heard of.
Have you thought about using the Williams "saved wax" sand casting technique? It produces highly accurate product. It will even show fingerprints in the casting if they are not removed prior to casting.