Up for sale is an exceptionally rare piece of mid-century educational technology and language laboratory history. This is an "Elementary Spanish (Experimental)" audio instructional curriculum box set produced by Ellamac Incorporated of Wilmette, Illinois.Designed by Jean North Lutter, this pilot set features the patented mid-century Language Master phonetic training platform, using specialized cardstock flashcards backed by integrated magnetic tape ribbons.What is Included:Original Rigid Cardboard Box: Measures approximately 11" x 5" and features the original typed manufacturer/pilot label on the lid.74+ Audio Cards: Contains 74 distinct language cards plus a small handful of duplicate cards. Each card features typed vocabulary phrases at the top and the signature brown magnetic audio stripe running along the bottom edge. Includes a mix of Spanish vocabulary cards and 1 unique German audio card sample, highlighting its true nature as an experimental classroom prototype run.Loose Curriculum Master Sheets: Includes the original, rare typed mimeograph lesson guides/scripts with perforated edges detailing the translations and curriculum framework.Condition Notes:Cardboard Box: Visually intact with wear, scuffing, and edge rubbing consistent with its age and classroom storage history. The typed label shows light yellowing but remains fully legible.Cards & Sheets: Paper items show minor handling wear and age toning. The magnetic tape ribbons are physically intact, though they are untested as the standalone desktop playback machine is not included.Shipping & Handling:Item will be packaged with extreme care. The vintage cardboard box will be securely bubble-wrapped, and the loose master sheets will be protected in a plastic sleeve to ensure they remain flat and dry during transit.