Porcelain and pottery marks - Helena Wolfsohn marks
PM&M [Germany / Saxony / Dresden (02)]
Dresden Porcelain and the Dresden Crown Mark - Antique Marks
Helena Wolfsohn - Canterbury Museum
Helena Wolfsohn Marks - My Porcelains.com
Meissen Marks Blue Crossed Swords & Augustus Rex Marks - Antique Marks
Antiques Collection: Meissen Style Helena Wolfsohn Vase
Identifying Marks and Symbols on Ceramic, China and Pottery|
Dresden Porcelain Studios Identification & Value Guide
Dresden Porcelain (Germany) figures and groups