It was part of a series of "Player Packs" designed to provide specialized equipment and lore for specific character classes.
In software development, "1115" is sometimes a specific issue or "pack" of fixes in repositories like Thorium-Win on GitHub . Tsr 01115 Thief's Players Pack - Internet Archive pack 1115.rar
If you are not referring to D&D, "pack 1115" could relate to: It was part of a series of "Player
Rather than a single narrative, the pack provided players with tools to build their own stories, including: A 32-page booklet with thief-specific lore, advanced rules,
A miniature figurine or special token (in original boxed versions).
A 32-page booklet with thief-specific lore, advanced rules, and roleplaying tips. A custom fold-out character sheet. Reference cards for thief skills and equipment.
This "pack" refers to the supplement titled The Thief's Player Pack , published by TSR in 1994 with the product code TSR 1115 .