ROYAL CROWN DERBY BLUE AVES 10-1/2 DINNER PLATE – MINT. This English Royal Crown Derby Blue Aves dinner plate features a blue birds among foliate motif on a white ground. Plate is in excellent condition, without chips, cracks, repairs or crazing. It’s measures approx. Plate marked Royal Crown Derby England with a crown mark. Quoted price applies only to the 48 US contiguous states. Boxes, APO, FPO, or DPO addresses.