Dating dutch delft tiles
This mark is a blue cursive "D" with an "A" attached, almost blended together.
Over the years, the distinctive blue-and-white Delftware grew in popularity, increasing the amount of antique vases, plates and figurines that may be found across the globe.
You will also find that quite a bit of Royal Delft is sold, for a number of reasons: It is the factory most tourists visit, it is generally regarded as the finest quality, and they have had the best system for marking and dating their pieces for the longest time.
Their pieces are clearly marked with a date-code back to 1879.
This is because the Netherlands doesn't have strict laws about "Country of Origin" labeling as we do here in the States.
We are used to seeing products marked "Made In China", and we accept it for the low prices they bring, but in Holland, the stuff made in China is often sitting on the shelf right next to the pieces that are the true blue delftware, with no distinction whatsoever.