Pbthal: This could refer to a specific pressing quality or type, but without standard reference, it's hard to decode. It might relate to the physical quality or mastering of the vinyl.
However, the audiophile argument holds: UMG has never commercially released a 24/96 transfer of the original 1980 UK lacquer. The only official high-res U2 Boy is from the 2015 "Mastered for iTunes" or the 2008 remaster, both of which are sourced from different tape generations and processed with limiting. u2 boy 1980 uk pbthal lp 2496 flac vtw link
Equipment & Quality: PBTHAL is renowned for using high-end turntables and cartridges (like the VPI or AT150ANV) to create "24/96" (24-bit/96kHz) FLAC files. These files aim to capture the specific "warmth" and dynamic range of the original vinyl that digital CDs often lose during the "loudness wars". A proper metadata/title tag for that FLAC file