Please help with 1920's desk lock

[kslocker]

This is my first post here.
I have my mother's old writing desk, best info I have is that it's from the 1920's; maybe from 1910's.
It has two separate locks, the slanted upper part and the drawer.
I have a key that fits the drawer, but it won't fit into the upper part. The diameter of the key barrel is
small enough that it easily fits into the drawer lock, but it won't fit the upper lock!
I'm posting pics here; best I can tell is that if I had another key just like the one I have but with a smaller-sized barrel, it might open the upper lock.
I took the lock out of the drawer to show you what the lock looks like, along with a couple of pics of the key. Remember, the key I have fits the drawer but not the lock in the upper part.
Can anyone help me find a key just like the one I have, but with a barrel slightly smaller diameter?

[GWiens2001]

Since the key barrel is of a different diameter, then it stands to reason that the cuts of the key will be different, as well. Either you or more likely a locksmith will need to impression a key for the lock.

As for where to find a blank - go to Ace Hardware and ask for their furniture lock keys. Then try to find a blank similar to your key, but smaller diameter. Don't worry if the key blade is too tall or long. That can be fixed with a file.

After that, you are down to impressioning the key. There is a thread on impressioning different kinds of locks here. Scroll down to the section on lever locks. Your lock is a lever lock.

Best of luck!

Gordon

[kslocker]

Thanks for that, GWeins2001, it's greatly appreciated. I especially like the discussion about impressioning a key. And, I didn't know the lock was considered a lever lock!

[GWiens2001]

In your pictures of your lock, in the big round hole you can see the levers and the stump from the bolt. That is how I knew it is a lever lock. The same format (barrel key) can also be used with warded locks as well as some that have the key directly contact only the bolt.

Gordon