Antique Dutch Blue & White Royal Delft Plate with a Sailing Boat - 1919

The tin glazed earthenware plate decorated in shades of blue in the center with a Dutch brown sailing vessel in a Dutch landscape with a windmill. The rim with stylized flowers.
Signed on the back in underglaze blue for:
DE PORCELEYNE FLES  - ROYAL  DELFT 
DELFT - HOLLAND  &  AO = 1919
Two painters worked on the painting on clay.

Painter’s initals: VR = Augustinus Eugene Virgile Roggeveen
Employment dates: 1892  - 1945         
Painter’s initials: VB  =    Willem Alexander Karel Hendrik Frederik van Baarsel.                     
Employment dates: June 30th, 1893 - 1948.

Diameter: 22,8 cm. (9 inches.)        
Weight: 463 grams.