That's a LaGard 2200: it's basically a combination safe lock that's been modified to work with a key (like an Abloy-style disc-detainer lock), instead of requiring you to dial a four-digit combination.
The key shown in your first photo is the brass setup key (cut to a combination of "0-0-0-0"): it's what the lock is first coded to when it leaves the factory, and you would use that key when changing the combination to the actual working key.
You can find more information
here.
