Vanilla mesh, extracted from the Skyrim BSA archives. Enhanced Textures Detail (UV-Tweaks) causes the wrong size and placement of the sign.

Either use this, or delete the file RiftenRWRaggedSign01.nif from ETD found under Dungeons\Riften\ThievesGuild

Various lighting mods place a chandelier where the sign is supposed to be. In case you are encountering this, use this ESP instead the one from the FOMOD. Works with vanilla, ELE, ELFX and Relighting Skyrim.

Thx Lollia for sharing!

FOMOD now includes an optional esp that re-activates the sign and places it back in the Ragged Flagon, to use this mod stand alone.

DO NOT use the plugin, if you have any mod that adds the sign back in (e.g. Opulent Thieves Guild)

Textures only! FOMOD with both versions