Thank you to all who replied. I should have indicated that the car I am trying to research is a 1923 Mercer Series Six Sporting. I can trace it back to Louis Stiritz who sold it to William Harrah’s. Prior to about 1947 the ownership gets fuzzy.
Considering Wayne Sheldon’s comment it sounds like the end of the line. Still I am not too disappointed to only know he past 73 years of its history.
Thanks to all for the input