Collier Holland Planters and Gouda Pottery

Q I think I have a Collier Holland No. 561 planter. The planter is oval, slightly bulbous and has a rolled rim. It looks like the Collier pattern made by Gouda pottery, but it does not say Gouda. Other markings on the bottom are two diamonds, one above the other, and a stylized house. Have you come across anything like this?

A Gouda pottery is popular with collectors. Gouda, Holland, has been a pottery center since the 17th century. And Gouda is the generic name for pottery made in several factories there. Some early Gouda items are marked with only a pattern name, or a pattern name and a number, and with or without the word Gouda. The Plateelbakkerij Zuid-Holland or PZH factory was founded in Gouda in 1897. In about 1910, the company developed a new process to make matte glazed pottery. Your planter has a version of the famous PZH logo ? the little house that represents the Gate of Lazarus, once an impressive stone doorway of the leper infirmary in Gouda. The two diamonds, tip to tip, are the date mark for 1923. Gouda planters of this era sell for about $125 to $250.