Hi All,

I was given this old lock from a friend of mine, I know very little about it, all I know is the key is quite unusual as it has a pin in the center, when the key is inserted into the lock it lifts one of the back springs & the barrel of the key lifts the other.

I think it is dated 1813 as it has GR stamped on the tongue, I cannot make out the manufactures name.
Just wondering if anyone has seen one before & knows anything about the lock. Any help would be much appreciated.

Thanks
Alan
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