Original old stereo magazine vintage ad for ACOUSTIC RESEARCH INC.  Main office and factory was located at 24 Thorndike Street, Cambridge, MA. AR-3 equipment reports green will reveal the almost total absence of coloration introduced.  Sounds more true to the original program than those of any other commercially manufactured speaker system. This unique one-page 1961 high fidelity, magazine advertisement would display beautifully matted and framed.  It would make a nice accompaniment to your vintage stereo equipment.