173081.213048 These are the #'s on my GGH Sienna Day. I am blind as a bat (and the 3's looks like 8's!!!)but got out the magnifying glass. Hope this helps. There is also a thread that gives info like this under Balenciaga Reference Library (under styles) I think????Could someone please let me know what the serial numbers are on the underside of your leather tag on a Giant GOLD Hardware Hobo? Thanks in advance!!