The 1st and 2nd digits represent the year the cell was manufactured, the 3rd and 4th represent the month, and it's generally believed the last two characters represent a batch code.
As indicated in the image, the code is situated along the longitudinal axis of the cell immediately above the seam of its jacket.
Ok!! Now I see why I could not find it....with my eyes I would certainly need a magnifying glass and know exactly where to look as I would not have ever looked for CLEAR stamping! Thanks very much for this information.
cheers,
Ken