Hi, Yes they did, and sometimes inside the double L. However according to an expert author of a book I have, look for high quality on your item, also the L should be a pale blue and shaded around edges and the word Sevres should have a s at the end. Beware if it looks painted on and a bright blue. Sevres is still being made today. On older versions the word sevres is sometimes not clear. Their is one on Sevres image marks on the back of a plate. After 1891 all imports were supposed to be marked factory district or country. Hpoe this helps you.