HI GUYS THE NUMBER ON THE CERTIFICATION SHEET SIGNED BY JENS IS 0648, AND THE DATE IS 13/02/2008, THAT'S ALL I CAN TELL YOU, SO WE ARE JUST GOING To HAVE to LIVE WITH IT !!! I THINK YOU WILL HAVE TO TALK WITH Mr RITTER to FIND OUT ABOUT DATES & SERIAL NUMBERS and HOW THEY ARE ISSUED, KEEP...