This is Svea 123 backpacker stove, made in Sweden all in brass. With only one moving part, the valve, they have a well-established record of reliability among weekend hikers to extreme mountain climbers alike. It runs on white gas (Coleman fuel) and is self-pressurizing, meaning no pumping to build pressure in the tank. You prime (preheat) the stove with a small amount of fuel placed in a shallow reservoir beneath the burner, light it, which heats up the tubing thus vaporizing the gas for ignition at the burner. Very ingenious.
The first model the 123, was introduced in 1955. Then in 1969 the 123R came on with the only difference being a built-in cleaning needle in the burner. This is that model and it was sold in 1976.
How do I know that?
It was still in the original box along with the sales receipt from North Face! Someone paid $25 for it back then. Today brand new ones which are identical to this sell for $100. I paid $5.
It comes with a aluminum cup and handle
which is the cover for when you pack it away.
I bought it from a seller who gets his junk from unclaimed storage lockers. I know the stove was well-cared for - who else would keep it stored in its original box along with the instructions and the receipt? I could tell the little stove was well used from the patina to it also all the black soot that was on it. I wanted to remove the soot but leave the patina alone which soaking in some vinegar for a few minutes did the job. Some people really polish the brass out which makes them look brilliant but I didn't want that. I feel bad for the person who once owned this and probably lost his storage locker for one reason or another to auction. It would be neat to know all the wilderness places this little stove has been. And yes, it works great with their little pulsating roaring sound like a jet engine at take off. It boiled a cup of water in three minutes.