REF: GV99ABGy / 23Z - wwyy or GV99ABMy / 23Z - wwyy, with A meaning the range from 0 to 9, with B meaning the color from 0 to 9, with Gy & My meaning the country code / y from 0 to 9, with /23 meaning the production site code, with Z meaning the After Sale Service index for internal traceability from A to Z, with wwyy meaning production dates- ww from 01 to 52 for the week/ yy last 2 digits of the year.