The USA-F has been discussed at lengths on the Smith forum. I have seen a number with the marking on the barrels only without the flats markings flaming bomb, crossed cannons and RLB or some other military inspector's mark. All that I have seen were made in 1942. If it is an inspector's mark he only worked in 1942.
Maybe as suggested, USA was a patriotic mark added by worker F or maybe it stands for Fulton. USA-F has also been seen on the boxlock Fultons as some of those were also sold to the military. Ithaca and Stevens also sold doubles to the military but none I have seen have USA-F marks which seems exclusive to Hunter Arms.
I have two fully marked Smith ordnance guns. One with USA-F; the other not. I have one with just the USA-F mark. All were made in 1942.
Last edited by 2holer; 08/13/13 10:40 AM.
