Very vintage bowl.
Made by: Villeray & Boch. 
Dish bowl is well marked.
This piece is stamped in green underglaze on the base with a knight and shield.
The pattern name is 'Old Treviris', a V&BM. 
A number 1568.
Made in Saar Basin.
The marking indicates it's age to be between 1890-1920.
Pattern is very colorful floral with fruits arrangements encircling the inside center of bowl.

History: 
Mettlach is a name synonymous with quality and value. 
Mettlach (is named after the valley) is one of the many factories Villeroy & Boch (V&B).
Located at the Saar River in Western Germany, Very close to France, and Luxembourg. 
The Mettlach Potter factory is on the grounds of a former Benedictine Abbey dating to the 10th century.
Mettlach has produced dinnerware, ashtrays, plaques, pitchers, jars, vases, as well as beer steins amongst other various wares.