Locks in shape of fish
Fish-shaped locks were popular during the Joseon dynasty because fish, in particular carp, were auspicious symbols of courage and persistence. Boys and sons were often equated to carp with hopes they would one day become successful officials. There are incised designs to articulate scales and fins. Since the designs are only on one side, it is clear that the orientation of the lock is with the fish facing left. The locking mechanism is similar to the more common rectangular lock. An L-shaped key is placed in the slot near the tail, which pushes out the shackle near the head.
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