Impressed shield mark, on all Nymphenburg products
Shield mark in blue underglaze around 1894.
Blue shield mark from 1895 - 1910.
Green underglaze shield mark from 1910 - 1975.
Green shield mark from 1975 - 1996.
Green shield mark from 1997 - 2007.
Shield mark in green since 2007.
Read more about it here.