Folks, we have an answer from the Sales Manager of Wilesco, Mike Stimming.
Mike says:
"This limited edtition label was used for the first hundred engines and is no longer stick on the engine You don’t have to be worried about this sticker. It is not available any more. "
And when asked about the plate on the side of the base of the unit, he answered:
"Your engine will have that plate with a number on it to show that is one of the limited edition."
So now we know :-)
Bruce
NZ