have 3 $1 notes all 3 are from San Francisco: The serial numbers are: L79777797D series1993 L79777797N series 2013 L79777797B series 2021 These span almost 3 decades
I have a note collection which includes similar $1 notes: same SN but different series. Not worth anything extra, but a neat coincidence & I like seeing them periodically. (I'm the only one who looks at my note collection. ) Hold onto them, if only for your own satisfaction.
Fancy Serial Number Checker rates this serial as "Extremely Cool" https://www.mycurrencycollection.com/reference/fancy-serial-number-checker/79777797 A quick Ebay search also shows that you probably already know these are valuable, as you paid $488 for two of them yesterday, one of which is graded CGA 66