Может это уже здесь писали, на всякий напишу.

Example:
E720JPEG1:
E720 : Model E720
JP : Area code
E : Year 2005 ( V : 2002 ; W : 2003 ; D : 2004)
G : August (A:January ; B:February….. L: December)
1 : 1st version in month

AREA CODE:

Europe:
XA: France/Italy
XB : Denmark/Norway/Sweden
XC : Portugal/Spain
XD : Czech/Hungary/Slovenia/Croatia-?
XE : Russia/Czech/Croatia-?
XF : Romania/Croatian-?
XX : France/Autria/Belgium/Germany/Hungary/Italy/UK/Spain

Africa:
JC : Algeria/Tunisia
JP/JR : Arabic
JV : Turkey

Asia:
DB : Vietnam
DC : Thailand
DD : India
DT : Australia
DX : Thailand/Indonesia/Vietnam/Malaysia/