Literally translated: Some serial number, leather black / seat(?), leather classik grey, UST (dont know, some acronym) with inprinted porsche coat of arms, 993 sports school.
It is the shorthand description of the seat design. UST usually means Umsatzsteuer, some tax like sales tax. But here it should be someting else. "Sport Schule" could be everything from the manufacturer over the quality control guy to the seat type.