Eldon (clearly marked on the front-facing badge/indentation visible in the detail photo). Eldon Office Products was a prominent mid-to-late 20th-century manufacturer known for classic office accessories, desk organizers, and molded plasticware. A modular, tiered desktop filing system featuring three interlocking trays supported by removable vertical corner posts or risers, allowing documents, mail, or folders to be organized vertically while saving desk space. Mid-Century Modern / Retro Office style, typical of office organization pieces produced from the 1970s through the 1980s. Features standard vintage surface wear, including minor scuffs and scratches on the high-gloss plastic finish consistent with age and office use.