The bag looks authentic from the pictures and the date code looks right, but the seller's previous auction contains bags/wallets with the wrong date codes:
http://cgi.ebay.com/100-Guaranteed-...ryZ63852QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Please help authenticate this bag!
http://cgi.ebay.com/100-Guaranteed-...ryZ63852QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Please help authenticate this bag!