I can also confirm for the quilted so black boy in the grained lambskin version (with sparks of iridescence in the leather), looks like caviar.
It was released for the 17S season. Here is the code for old medium size: A67086 Y25568 94305. I bought mine in April 2017.
Later it was maybe re-released in calfskin/lambskin variations, but not again in the grained leather with caviar look.