Family heirleum from about 1900 CA

My mother in law gave this to us in 1970 when we were married. It was hand made for her grandmother in California. It takes a room large enough to handle it properly. It has two extensions and we have had many a holiday, family dinner with 16 at the same table! Only 8 chairs, so we round up the folding chairs! However, my mother in law can't remember anything about it........where it was made, by whom or actual date of manufacture. It is a narrow table and we understood that is mission style.