Want to sell property mentioned in WILL that is expired

My grandfather wrote a WILL (unregistered) stating that out of two of his properties, one is to be enjoyed by his elder son who is my father and another one by his younger son after his death and his wife's death. He has also mentioned in the WILL that he wants his daughter's marriage to be carried out in a well manner with all necessity so she has a good life ahead. My grandfather wrote the WILL in 1993 which expired in the same year.

The person who witnessed this is alive. My aunt got married in 1984. Can I sell the property on basis of WILL or do I need my father's sister's signature to sell the property? The patta is still on my grandfather's name. All other tax documents are on my dad's name. Please advise.