Nope, it's 30Govt.03. He double checked and got back with me.
I'm thnking Winchester put both of them out there.
From what I've been able to dig up, there is a 'range' of serial numbers where these were produced in a 'batch'.
I would say he is wrong...no deadfuggin wrong!
By 1948 the 30-03 was long dead and gone. Even the first run Springfields were converted to 30-06 about 43 years before that.