They have series number D4697 and this plate is stamped May 30.
1930s Royal Doulton Series Ware Gnomes B or Munchkins Plate D4697 #B Charity
Royal Doulton Series ware Coaching Series Vase Height 12.5cm
Two Stunning 1930s ROYAL DOULTON Teniers Jugs / Vases D5415 9" & 6.5"
Vintage 1930s Royal Doulton Lady Figurine the old Balloon Seller HN 1315 England
1930s Royal Doulton D4390 Country Farm Scene 10.5” Plate
Vintage Antique pre 1930s Royal Doulton Large Wash Basin or Bowl Fruit in Urn
