Hammer–Those look just like mine except mine are all plain aluminium instead of anodized like those in your picture. Who is the manufacture and model type of the projector?
Slickrick–I have the Swearengen book. By the way, I only paid $5.00 for it back about 1970 in a used book store. Like yours, it is in mint condition with dustjacket. I also have the Penguin cartridges you show the page for. The thread is different on these flares. I also have the Hagen cartridges. They come in a small flat round plastic box. They are used as a stand-alone tear-gas round in .22 pistols. They also made them in various scents of purfume. Those were an early attempt at a room freshner before aerisol cans were available. I have shot a few of these and if you shoot 4-6 of them, they actually do a pretty good job for about 10 minutes. The “Acorn” is not a headstamp for Hagen. It is the headstamp of R.W.S. and other associated companies of Germany who made 6mm starter pistol blanks sold in containers of many brands