S/N FXXXXX would not fit into the 46 models. It would come in 48 based on other examples on my list. The stand would be interesting as it may well have been taken from something else. I agree with needing photos.
The next prior S/N I show is E69XXX (48, was mine, but sold), and the next later one is F95XXX (also 48). All the GXXXXX numbers I have show pre August of '48, with several having been checked for other indications of time. Most of the E numbers were also verified through other parts dates.
Show us the photos!!
REC