Nope, that's a G and a dam nice one at that!!.
You took the words right out of my mouth! Prewar Fs are straight grip and a bit more plainer in appearance. What cartridge is it chambered for?
This one is 300 Savage. I plan to take it to my gunsmith tomorrow and have him D&T it for a scope and cut an inch off the stock and fit a pad to it.
JOKING! I would NEVER do that to a fine old rifle even if I can't see the sights.