I would assume that this RPPC was made to announce the birth of a baby girl, though the "fine girl" might also describe this pretty and kind looking Red Cross Nurse herself, whose uniform places her in the 1910s or so. Could be a fun one to send as a birth announcement yet, or as a gift to a dear daughter on the anniversary of her arrival in the world!
3 1/2" x 5 1/2", unused back, good antique condition.