This gorgeous demitasse cup and saucer was made by C.Tielsch & Co. in Altwasser, Silesia, Germany. This is an area which was also part of Poland at one time and known as Walbrzych, Poland. The back stamp shown on the cup and saucer was used 1875-1934. From the delicately scalloped edges and finely, detailed workmanship, I believe it is late 1800s as this is the Florentine style which was popular prior to 1900. 

The saucer is approximately 4.125 inches across and the cup is about 2" high with a mouth that is 2.125 inches. From the handle of the cup across it is approximately 3". 

Gorgeous antique condition!