Disentanglement - The Cannon and Cord

The Cannon and Cord
 
The Cannon and Cord - Drawing
Craftsman:John Berkeley
Category:Disentanglement
Material:African Blackwood & Mahogany

The objective is to remove the cord and ball from the cannon. The muzzle end of the cannon is slotted back past the ring. This is clear in the drawing. This is a classic and fairly simple disentanglement puzzle.