Today I came across a strange and obscure key... Unfortunately I did not take a picture of it... it was on my friend's keychain...
The Key:
The key looked very strange... it has multiple grooves on both sides and probabally goes to a nasty keyway...

The color was a bright brass/nickel silver color.
On one side it was stamped Embossed "DO NOT DUPLICATE" and it was a neutered bow like any other DND KEY
It was the length of a DND KW10 Key from Ilco
It had the word "LIBERTY" and the number "3" on the other side...
Has anyone seen any keys like this and/or know what kind of lock it belongs to? Im curious!!! The keyway must be nasty!!!

Also I know Ilco makes a proprietary keyway for locksmiths, has anyone seen any?
Thanks
-Gswimfrk