Serial Number
Serial Number

X 1st digit: Code of Country
E 2nd digit: Code of Printing works or 2nd digit of Code of Country (only non Euro Countries)
MM 3rd+4th digit: Code of Editor or Place
040296 5th-10th digit: Serial Number

Year of Issue and Motif
Year of Issue and MotifYear of Issue and Motif

The first 4 letters of the serial number combined with Year and Motif Number gives a unique identification: XEMM 2017-1