Thanks Patrick,
What a lovely line-up of penguins , looks like a scene from the Antarctic ! Yours do look distinctly different in certain ways but there are also similarities . Mine is made of lead crystal and doesn't have the bubbles. It does have a small hole in the base which could be a cut-off bubble.
I will bring it to Cambridge so that you can have a look and see what you think about the colour. It might be possible that it is WF, it certainly is very well modeled and looks like a really cute penguin chick. Cheers, Mike.