It's hidden away along the seam in one of the back slip pockets (on the side with the Made in stamp if I remember correctly) on the right hand side (if the wallet is facing you) about 1/4" from the top. A bright light, such as the one on most phones, is helpful in flushing it out.I'm new here, so don't laugh but where is the date stamp on my Clemence? I looked all it tonight and didn't see it.