Years ago I had Sam Everly (Deceased ALR Member) replace the cock on a brand new Chambers Late Ketland lock. Another friend copied the engraving on the Golcher lock. I rounded the tail of the lock, all this was to make as close a copy of the Jos. Golcher that was used on a Bear Pistol made by my Great Uncle Mathew Gillespie. I never finished making the Bear pistol and the lock has lain in my shop until now. Sorry It has not been cleaned of all the dust! I did not notice it until after I made the photos.
You can change the cock back to a regular Late Ketland and its back to a normal Late Ketland except for the rounded tail.
Its never been on a gun. $260 to your door.