I had my wallet for almost a month before I found the date code. I tried when I first got it, but I was afraid of mutilating the wallet in my attempt to find it. I did manage to locate it though. It was CT1005.
yeah ive had my ipod case for a year now, and my wallet for about 8 months and i just found out my codes i though they didnt print them on small leather goods but they do!