The Chicago lock company has a CG series of key codes. CG1, CG2, etc...
They look similar, but they aren't. Look closely at the key slot on the lock. Mine is asymmetrical.
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The correct key will be a match to the slot. Here is one that fits my lock and one that doesn't, notice the symmetry of the second key. There is also a key that is off center the other way. Unfortunately, different companies call the profiles by CG codes that don't jive with Chicago's. So CG1 might be the same as CG2. The point is, look for the correct profile in the CG series. These keys are all over eBay and are also at your local lock shop.
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