Demo Padlock 272
 
brass iron demo lock to show the function of a brother key lock !
The lock measures 5.1" tall, 3" wide and 2" deep ( incl. front door )

Both keys and the lock has
the number 49

You can open the lock to show the inside
and you can see how the first key lock the shackle with the bolt
and the second key lock than this bolt.
Key 1 can close and open the lock alone... if closed by both keys,
both keys are needed to open the lock again.
Key 2 can not close or open the lock alone !
10-145-1997