Vintage Royal Worcester pie bird (blue & white)

Royal Worcester pie bird, designed in 1950 by Paul Gertner, in it's original box. The funnel and the bird are two separate pieces. The funnel (white part) is placed in the middle of a pie crust and steam escapes through the top during baking so the juices remain inside the pie. The bird is ornamental and is placed on top of the funnel after baking so that it is prettier when serving the pie.

I also have two that are blackbirds (posted separately). It was also made in brown, which I do not have.