i just got my manhattan pm

And it's not a "serial number", it's commonly referred to as a date code. The style number is printed on the white paper tag that came with the bag.
 
As mentioned before, look inside the pocket along the seam. Here's a pic for reference:

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i found it!!! it says S00057. doesnt that mean it ws made may 2007?? it's not even may yet. i got this off elux. can someone tell me wut's wrong?


it's most likely SD0057
and for the year 07, they changed the date code to reflect week and year instead of how it used to be which was month and year.......so your bag was made in the 5th week of 07, so most likely in the very beginning of Feb.