For your consideration at this wonderful sale is a rareApple Macintosh Performa 575 and LC 575 Rear Ports Cover with part number922-0704. It is also compatible with a Performa 577 and Performa 578 and thevariations of the LC 570 series with a 68040 processor. The expansion slotcover for the LC-PDS card area has the detachable metal and plastic piece cover(part numbers 815-1154 and 805-0137), and the port cover for the PerformaCommunications/Ethernet slot. EMI shielding is in place. The panel doesnot include screws. Since the plastics are in existence since 1994, normal agingprocess in the beige color may have occurred, including chips or stress cracksmay develop over time near the user-serviceable tabs. It is very important tonote that the back of the cover has an opening for just 1 ADB port and 2 serialports on the left - this cover is not compatible with the logic board on aPerforma 550/560 (two ADB ports on the left) or LC 580 (slot for analogue audiovideo connections), however, you may use this on the case of an LC 520 orPerforma 550 when using it exclusively with the LC 575 or Performa 575 logicboard. It could be used with a Macintosh TV that was upgraded with a LC 575logic board (Mystic upgrade), and then have this part spray-painted with blackpaint.