The caption of a photo of Ruby from 1923 refers to "WW1 heroes". However, in 1923, the war from 1914-1918 would have been referred to as "The Great War".
Ruby mentions to Anna that she has spent the last hundred years rereading "The Great Gatsby" from the collection of things in her room that were left at her death in 1923. "Gatsby" was not published until 1925.
Ruby shows Anna a photo of Charlie from her collection which only dates to before her death in 1923. Charlie wears what appears to be a US Navy officer's uniform with a Silver Star medal; the Silver Star was not designed or authorized by Congress until 1932 and not awarded for the first time until a decade later during World War II.
Anna's surname is mentioned throughout the movie as Vazquez. It is listed as Jenkins in the end credits.