There are more than one key pattern. Take to locksmith shop as they are a standard luggage key. Paul in Virginia
As far as I know Americase is out of business.......at least not making gun cases.......I'll give it a try.
99% chance it's a Franzen 1400, they're available on ebay. There is at least one non-1400 latch through, I came across a huge safari case at a gun shop one time that didn't have any keys, I tried the 1400 I have on my keychain and it didn't work (I was going to give it to the shop owner to include with the case as I had spares). Did a quick look and the other one may be the 1407, that's the only other Franzen key I found. But like I said, it's probably a 1400.