I can't find any info on the web as to what model this might be or even if this is an official Lian Li product at all but it does really resemble the classic layout popularized by the PC-60. Case has moderate to heavy signs of wear as expected for a used case that’s 20 years old, with scrapes/dings on the sides/top of the case (especially the right side panel), scrapes/stains/stickers/residue on the front, and tape residue/remnants on both side panels.
eBay