Diving with the "Aqua-Lung" by Gagnan ,Cousteau 1959 US Divers

In my opinion this may be a rare publication since I do not see many of this publication being offered for sale. It was published in 1959 at a time when SCUBA diving was in its infancy. The cover shows the picture of Jacques Cousteau and Emil Gagnan who were the co-inventors of the aqua-lung. The publication goes into a LOT of detail such as explaining how a self-contained diving unit functions , maintenance and servicing of the aqua-master regulator and how to safely use the apparatus. For diving enthusiasts this is a treasured piece of literature. It is being sold as is. No returns and the buyer pays for shipping.