Posted 3 years ago
Two years later and I can mark this one as finally solved!
This morning on CW I found a couple of pieces that distracted my attention and got me back on the path of Klaas Vet and his brother Jacob.
The Veet brothers had begun a factory of same fame at Purmerend in 1903. But a fire in the factory closed them down in 1906. They moved to Arnhem and continued with their designs used at the earlier factory. Klaas Vet designed the shapes and others came up with the designs: Dirk Straus, Philip Lagrand & Philip van Praag. In 1917 Willem Hartgring joined them.
This pattern is called Decor : 889
The mark just reads in script 201 / 889 and printed Made in Holland.
The rooster mark was not used.