First Period Black Mark - 1863 - 1890 A capital R in a circle was added in 1955 to signify that the trademark had been registered in the United States.

Is it safe to wash china in dishwasher?

China: Yes Fine china, especially if produced after 1979, is perfectly safe to clean in your dishwasher by most manufacturers recommendations. Lennox, Noritake and Mikasa all suggest washing fine china in the dishwasher as long as the light or china setting is selected.