I believe it is possible to add the H3 gas tube into the watch, but the amount of work may be a lot. If you add to the dial, you will need to modify the movement as it adds to the height of the dial. If you add to the hands, you will also need to modify the movement as you need a more clearance between the hands. The other problem is if there is enough depth/ height in the watch to facilitate the new hight of the hands. I am not sure where you can get the tubes but I am sure popular search engines on the Internet will give you some answers.