They appear with further review to be two pairs. 475 are what I believe to be date stamps on the one pair and 2580 are on the other pair. They all have the 911PN stamped on them. The one pair has dunlops and the other have michelins.
Pics attached. Note these have been stored and just taken from storage to take pics. I have not cleaned them up. They are not new but look to have had very little use.
