I did a quick search and came up with this information on this critter.
It is a Shop smith 10E.
The 10E stands for experimental a 10ER stands for experimental revised.
They were made from 1947 to 1953 so mine is more than likely from the 40's.
They were invented by Dr. Hans Goldschmidt of Albany, CA, in 1947; made by the Magna America Corporation.
Shopsmith INC did not make these machines.
Shopsmith INC didn't come around until 1972.
https://en.wikipedia.org/wiki/Combin...#The_Shopsmith