Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I found the article in my Toy Steam News, unfortunately I cannot post it on here as it’s all copyright material… Dick Cutler (author of the article) states that they were likely built sometime after WWII when there was a surplus of aluminum available. He also says it has a double-walled water jacket boiler with a central flue tube.

There is also an exploded view/diagram of the engine and it lists the safety valve thread as 1/4-28 thread.

(Sent you an email as well)