Antique Domino Set from France, factory box included

23 Dominoes in what I assume is the original box factory which is lined with orange fabric and in gold lettering inside the upper lid says "Au Nain Bleu Paris"

Each domino, which I believe to be made from bone, measures 1.625" by 0.375" and there are 23 of them.

The box is a weathered leather blue and tan (where rubbed/faded). Measures 6.5" wide by 2.625" tall and 2.25" deep.

To open the box gently lift the lid and the front panel will drop down revealing your new pile of bones.