Map Coin

A small metal disk attached to a chain with a
multi colored gem in the center of the top.
With a simple command word or hand motion of
your choice the disk will project a map of the
world from the gem in it's center. Different disks
are inserted within the slot in the center of the
disk's side to change the projected map.
This is the most reliable map you can have as it
shows the current movement of the islands.
Worth-10 gp