Hi this is becoming a ballache of a topic. I don't have one of these but am lead to believe they are "Hong Kong" marked.
I have a W Germany brolly which Andrew knows about. This I thought was yellow but looking underneath the mushroom it is clearly orange/yellow so I'd say this one has faded.
However I really don't think the all yellow ones are necessarily all faded. The ones I have seen are uniformly yellow including the underneath of the mushroom. Other smurf colours which fade tend to be patchy in my experience. Also the smurf figure itself tends to be too good than if it has been torched by the sun.
The one I have I can buy as being faded and I have no doubt that this colour, like the gold emperor and the gold smurf can fade in the sun. However I very much doubt that the brolly red/orange will fade to a "perfect" yellow all over the mushroom.
I don't follow the science of a red mold fading to a perfect yellow mold and not really leaving any trace of it being sun induced.
Also in the SCCI letters the gang mention the yellow brolly as being a genuine variation.
I think it is.
Answers on a postcard please...
Martin