Empty duck box-ceramic pocket marked YR

Charming box in two parts, zoomorphic in the shape of a duck, who will be able to find a new life in a pocket, candy box... It is made of glazed ceramic (slurry?), it has pretty colors, green, purple... The letters yr are found in relief below. It seems relatively old, but I can't date it. This duck has traces of time and use: neither cracks nor chips, but small spots and abrasions on the enamelling and wear and stains at the level of both parts in contact and under the base. It measures 17 cm in length, 9 cm in width, 12 cm in height (at the level of the head). It weighs 420 g. Other ducks have or will land soon in my shop, if you want to adopt a family, I can offer you a group shipment.