Antique Faience Cockerel Handpainted Bowls

6 little dishes (measure 2 1/4" in diameter) handpainted with a rooster in pink and black with a blue line round the rim. No identifying marks on the base. Can anyone shed any light on where and when these were made?

Possibly French, They do like the cockerel motif.
Possibly Strasbourg, but look a little plain.

I feel sure that I saw them in large quantities throughout France, even though I was not a great traveller. Therefore I would imagine they were made in large quantities over a long period.

I have never seen any before, though I have travelled a lot, and lived, in France over the past 50 years. Can't find any on the internet or on auction sites either - do you have any idea what they're called? i'm wondering if they are for olive stones.