I tend to agree with Ky Jon. I just don't see this kind of thing either, not to say they aren't out there. Be sure the first number is not partially worn on one piece and they actually are the same. Someone with less than perfect vision may have struck them wrong, as Ky Jon suggests. If you get a bargain because of such a tiny error, put on your tape or DVD of Scotland The Brave and have a wee sip of a fine single malt to celebrate. We of Scottish blood would celebrate with you.