Tea cups marked "Occupied Japan," from the period following World War 2, are considered particularly collectible. Appraisers have experience, and their wealth of knowledge on everything antique will help them in deducing the artist, country of origin, and pattern history. Im not sure on mich more info. In 2006, Berlin banker Jorg Woltmann assumed full control of KPM as its sole shareholder, effectively privatizing the historic company. We have tried to include as many ceramics and pottery marks as possible, but also tried to avoid too much duplication. Pinterest. Many companies have always marked their items a certain way or with a peculiar symbol to prevent imitation and reproduction.