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

   Thanks for the good info and pictures.
 
  I need to get a copy of that catalog. 
 
   I bought a Bing vertical that's in the mail that has just one top ring and one center like yours. The base and burner are different than yours and an older style. The burner is a pot style. And the top of the boiler is nickel plated above the ring.

  I think it's just a little older than your engine because of it's burner style and base. Your engine probably followed it with the new style base and burner but still with one ring at the top.