this oil lamp is 12" tall including the burner.porcelain is in three parts and is 9 1/2" tall .has flowers going around and on the edges.colors are light blue pink light green and white.the mark is in blue in color and has the word germany in block letters on top then a crown that is attached to a dimond with the letters r w inside and the word rudolstadt underneath.nex to marking in red the number57 and off to the right bottom under glaze insiced is the number 635.can someone date the oil lamp and give rarity and value?
