Help, I'm looking for any information on character hieght, spacing, and style. How were the two number series oriented, did any of the characters line up top to bottom? Was there a number following the frame part number? If so, what did it signify? Mine appears to be yellow. 6.8.78 with the part number at the upper side of the frame followed by a dash ( - ) and a 3 digit number. Any help would be appreciated.