Good morning , Curt and all , If the pics settle anything with an implied date code , we would have to square the encrypted system with the serial nos on my tires. And a last 3 digit code does not work here. I can not figure out how a 3 digit code would work in a civilization which has a 12 month calendar. We have all seen date codes which use LETTERS for the month. With the exception of the small T in the box at the end of my serial nos , all letters on both Graham Mans tire and mine fall sufficiently early in the alphabet to serve as month codes. Curt , are the tire serial nos on your Auburns easy to read ? If so , where do they fit in ? I am getting curious about this. My tires came with my Cadillac in a parts pile including 4 wheels , but no rims . I would like to mount them up and use dual spares for touring. If there is any need for photographic testimony , I could email to anyone who knows how to post pics. I can also send a few pics of my '27 Cad that everyone falls in love with . It is in exquisite original unrestored condition. But as to to the encrypted date code , if indeed there is one , we here have not deciphered it yet. If it works for one , it must work for all the rest . Otherwise it does not work at all. Should John Kelsey be put upon to help resolve this ? Would it help to add to the database from participants surviving tires ? Do we really want an answer ? I hope all you great guys and gals get to do a lot of happy cruising this and all years , and may you never have to use your spares ! Carl