My grand mother left a WILL (SIGNED BY TWO WITNESS) In mid 1970 favouring all the properties in her name to my father, Grand ma had to Legal Heir viz my father and my aunt, in the same WILL my grand mother given few discripttions of few jewels (movable property) to my aunt. My father some how didn;t execute the WILL. Now my grand mother, witnesses who signed the will and my father all NO MORE, my grand ma passed away in mid 1980s and my Father passed away in 2010, Is the will still valid can Probate granted to mY mother ? what are the process.