Antique Dutch Orange, Blue & White Royal Delft Great War Plate. KEEP BRAVE SEA - 1915

The tin glazed earthenware plate decorated in shades of blue with a Dutch brown sailing vessel in windy water on sea. Houdt moedig zee. (Keep brave sea.) The rim with the orange patriotic Apples of Orange. (= Dutch Royal Family.)
Designed by Leon Senf. 
Signed on the back in underglaze blue for:
DE PORCELEYNE FLES - ROYAL DELFT 
DELFT - HOLLAND   -   ANNO 1915    
Painter’s initials: AB = Jurrien A. Burghoorn
Employment dates October 17th 1892 - 1949
Literature:
This item is shown in Rick Erickson - Royal Delft Page 136 - Fig. 11 - 40.
Some 3000 plates were produced.     

Diam.:  18,3 cm.  (7,2 inches.) 
Weight:  267 grams.