And this one is from 1970 and was considered top of the line back then. Sorry just doing some research and finding more about this awesome piece. This was EMT's number one piece back in the day!
http://www.emsmuseum.org/virtual-museum/equipment/articles/398240-1940-1950s-E-J-Resuscitator
This is a link to some info on the one in the EMS museum.
Well I'm a collector of many things, or you could say everything. Along my travels, I came along this amazing example of 40'S A&J Resuscitator. I've seen only one other one and it's in the Boston Museum. The one I have, is in far better shape than the one in the Museum. Mine has owners manuals...