Greg.... thanks!
NCdivingInstructor - the picture with the yellow frame holds three devices, one is a compass and one is an air gauge. Apparently the automatic decompression meter was a unique item developed by Scubapro at one time that gave way to the modern computer,
" The story of Scubapro begins in the early 60’s when founders Gustav Dalla Valle and Dick Bonin started the company. Since its inception, Scubapro has offered a wide range of products.One of these products was the Automatic Decompression Meter. While these units are no longer sold today, back in 1966 it was a breakthrough in diving technology. This device would become the predecessor for modern dive computers." I don’t know if this is one of those meters... maybe I should contact Scubapro and find out huh.
Mike2424 - Thanks, I hope to find a good home for it also :)
Roguediver - I’ll try and find out what kind of tank that is. I do know that it was inspected in 77.
Pixel - well "hello"