1.321.3400.78 is part of the Hummel figurine catalog number system. Hummel figurines have catalog numbers that indicate the size, year, and edition of the figurine. The first three digits indicate the size, with 1321 being the "Precious Moments" size, indicating a figurine of roughly 15 centimeters or 6 inches tall. The second three-digit portion, 3400, is the year and edition, with 34 meaning the item was released in 2000 and the 00 indicating the general issue version of the figurine. The final two digits, 78, give the figurine's model number, which can be used to identify the specific piece.