<p>hummm.....Alan, Thanks for the info on Date codes, very good to know & I will save this info ... unfortunately, I don't think It will help me choose which used lens I want from Adorama though, They have several of the same used lens and I thought the serial # would help me choose one.<br>
The lens is pre 2008 and if the code is stamped beside the rear lens element (medal end) I can't tell what year it was from. If it was in the serial # that would have been a help. I didn't choose the Canon Refurbished because it was $100 more and my husband doesn't treat equipment as well as I do so we thought save the $100.<br>
shutterbug78</p>