Very interesting to see them together. If all the parts are original to the lanterns then the green one is from somewhere around 1950 plus minus a couple of years, the brown one from the late 50s and the cream one from the early 70s.
When you see them together, it is obvious how the brown hood has a different style to the perforated collar part. Definitely an interesting find.
@Nils Stephenson The seller had it from new, he did tell me a story why the brown hoods were made. Which I have long forgotten what it was, I had never noticed the hood was taller. Thanks for mentioning it. Cheers Mark.