Hi Martin,
Mundus vult decipi, ergo decipiaturNice teapot with Dutch pseudo marks perhaps made by Alle de Haas.
Alle de Haas (1849-1923), founder father of Firm Alle de Haas in 1877, was a very talented master using the old silver techniques in combination with fantasy marks and later with pseudo/fake marks, because antique silver with the old guild marks sold far better than modern hand made silver in the traditional way.
See;
viewtopic.php?f=5&t=47774&p=143087&hilit=dutch+pseudo#p143087viewtopic.php?f=5&t=28590#p116738Best,
Peter