L.D. Alta Fidelidad

Shorthand "Larga Duración - Alta Fidelidad" late 50s and early 60s series / logo from Industrias Electricas Y Musicales Odeon S.A.I.C. to promote the LP vinyl format. Usually accompanied by the motto "Larga Duración · Microsurco - Irrompible - 33½ RPM"