Verne F. Bragg
I think that it is a full name. Normally the abbreviation for fort is "ft". It is true that when someone is scratching an inscription into a belt buckle they might use as few letters as possible, but why scratch the name of your base in it anyway? The reason you would want to put your name on a piece of gear in the first place is to get it back if you lose it. Putting only your first name and a base doesn’t seem the best way to do that. During WWII if you are where going to leave the mainland USA, you probably wouldn't spend that much time on one base and if you were stuck in the USA, your base is where you are most likely to lose any piece of gear anyway. If anything, I would think they would put a unit on it vice a location. This is especially true if you were set to go overseas. So my guess is that Verne put his last name and middle initial on it.