What a lovely engine. Gotta be pretty early as it stinks of Frank Whittle. Many years ago I bought a DeHavilland Ghost engine, as fitted to Venom and Vampire fighters, and the doomed Comet airliner. I think it was 1954? I paid £250 for it and thought it would be quite small. Wrong. The starter on the top was level with my eyes (I'm 5' 8") and the jetpipe was @3' diameter. I never did get around to firing it up, but I actually fell in love with that motor, until I bought a brand new, still in the box, Merlin.
You have good taste Sir!