Container - Porcelain

The impressed mark on the porcelain dinnerware is most likely the Fischer & Mieg (F&M) porcelain manufactory from Pirkenhammer (today Březová, Czech Republic).
This specific blind mark—in other words, a stamp pressed into the moist paste without color—can be clearly situated historically:
Manufacturer: Fischer & Mieg (Pirkenhammer).
Period: The impressed "F&M" mark was used mainly in the mid-19th century, roughly between 1853 and 1873.
Pirkenhammer was one of the most important porcelain factories in Bohemia and was known for its high quality.