Mariachi Vargas De Tecalitlan - Lorenzo Garza free for downloading

I have an old 18 string instrument that was found in El Paso Texas. It is signed by many famous people including Lorenzo Garza from the time of 1930's to 1950's. The paper inside the instrument case calls it a "Luto Mandolo" . It's in a wooden case. on the outside of the case is painted "Tipica Mexico Orchestra" ? Some of the signatures include, Fats Waller, Faye Ray, Nelson Eddy and the Gov. of New Mexico John E. Miles and a few others. I find it very interesting.