Gillers Antiques Ltd has dated this piece to the 1920s.

Handles and finials are blue with pink rings around the rims of finials and the enamelling is almost jewel-like in quality.
Each piece is marked with a Longwy mark to base.
Made by Longwy, France
Pattern No. D5685

1208 g
teapot - 13.5 cm tall, 20 cm spout to handle, 12 cm across widest part
creamer - 6 cm tall, 13 cm spout to handle, 9 cm across widest part
sugar bowl - 9 cm tall, 15 cm handle to handle, 10.5 cm across widest part

cup - 9 cm tall, 13 cm spout to handle, 10.5 cm across widest part
saucer - 2 cm tall, 15 cm diameter
Excellent antique condition. Wear to paint appropriate to age and use; crazing to bodies; marks on base.
Gillers Antiques Ltd has dated this piece to the 1920s.
You can view the stock and full dealer information on the Gillers Antiques Ltd Profile Page