Hi Dirk,
I have not seen a pink with contrasting, but that does not mean it is not out there... There is next to no documentation on Welz, so all research to determine their production is quite time consuming, looking for labels to link pieces, shapes and decors....
I recently actually found an example of a style of "knuckle" vase, commonly attributed to Kralik, which has a Welz label on it....
The site I am working on with Alfredo and others will likely have more Welz documentation than can be found anywhere.... It is kind of a pet project of mine, as I really like the bold contrasting colors they used on some of their production....
Craig