Need help identifying the sillcock valve shown in photograph.
That faucet has a few years on it. If it is leaking inside the wall you probably should just replace the faucet. It doesn't have to be the same brand.
Shut off the water and determine the source of the leak. In snow country it could be a burst pipe due to freezing. You'll have to access it from inside the house. If the inside of the wall is unfinished great, otherwise you'll have to open the wall. It will need to dry out anyway.
If you're in cold weather country you may want to replace it with a freezeless faucet.