Strack 1303, citing examples in Berlin, Paris, and Vienna, and illustrating the Paris specimen on pl. XX: from the same dies as yours.
Cohen 188, citing Paris, and wrongly rating as "Common". This coin is actually rare to very rare! I think it may come from only one reverse die.
Not in BM; cited from Cohen on p. 373, 2142 note.
Like the PIETAS TR POT III COS II S C middle bronze type of Marcus Caesar that I commented on a couple of months ago, this type of Faustina II apparently commemorates the birth of her second child, a boy, who sits on Pudicitia-Faustina's lap while her first child, a girl, stands on the ground before her. Both of these earliest offspring were soon to die, according to my own investigation of the birth and death dates of the children of Marcus and Faustina.