I have a brass chest lock that has 6 pins for the locking device, it also locks the fall front panel of the chest. One key locks the top lid and also locks the front panel. the lock is about 12 inches long. Behind the front panel is 6 drawers that are locked when the front panel is up and locked. I have never seen a lock like this before. I hope I have explained the lock well enough. One key, one lock secures the top lid and the front panel at the same time. Any information would be helpful. Thanks, Gordy