Set of 12 turquoise blue and gold duck knife holders mid-20th century

Here is a set of 12 bird knife holders in perfect condition. The birds - probably ducks - in turquoise ceramic are enhanced with gold on their beaks and gold edging on their plumage and tail. They date from the mid-20th century and are like new. Dimensions of a knife holder: length of 9 cm / maximum height (at the level of the duck's head) of 3.5 cm / width between 1.5 and 2 cm // weight of the set of 12 knife holders: just over 500 grams.