@Nils Stephenson Here's the picture of the jet taken with the aid of a magnifying glass: Here's something else near the bottom rim of the fount: an inscription in a some language. Anyone's guess? Looks a little like Thai language. Not sure. Maybe the previous owner had a damaged 1050 vaporizer or valve which he or she could not find any spares, and happened to chance upon some old surplus 1020 and 1080 parts that could be fitted in, albeit with some effort? And here's an image of the flame taken after 20 minutes of burning. .