You must log in or # to comment.
Summary: its a copper ring to provide induction damping to the compass needle (instead of liquid or a metal base which obscures the map)
This isn’t going to change the world, but it is a clever idea.
Summary: its a copper ring to provide induction damping to the compass needle (instead of liquid or a metal base which obscures the map)
This isn’t going to change the world, but it is a clever idea.
