So you have some wonderful Danish porcelain from either Royal Copenhagen or Bing & Grondahl , but you don't know, how old your cherrished item is? How do you date your porcelain? Fear not! Help is at hand! Both Royal Copenhagen and Bing & Grondahl has left clues in their trademarks/factory seals that will help you date your porcelain. Want to learn more about the history of Royal Copenhagen - click here! Or learn more about the history of Bing & Grondahl - click here! So how do you go about it? Underneath your item you can find the factory seal that tells you, which factory made it, but the style can also tell you something about when the piece was produced. Over the years changes where made to the seals, which can help you in your quest to date the item. The seals retain some features through the years like the three waves of Royal Copenhagen and the three towers and the B&G of Bing & Grondahl, but there are changes, which makes it possible to give a mor...