My Pre-War EG S/N 385XXX also has an E on the left and G on the right. I also have a pre-war G S/N 362XXX that just has the G on the right side.
The thing I noticed about the pre-war EG and G compared to my postwar EG is that the wood at the top of the wrist is more graceful. They beefed up the wood at the top of the wrist post war, it makes the lines not flow as well and looks a little clunky.
