Nice find. Look for any important or obscure reference to a date you find such as the below. These date serial numbers are usually combination digits representing a birthday, anniversary, often special holidays, or important memorial day or event. 09/11/2001, 07/04/1776...
Value: These serial numbers are special types not really fancy. There is usually no set pricing for these types of serial numbers and depends on the perceived value to a collector or buyer. They will become priceless if you meet the right person who is looking for a specific date for some reason or collects something related to that date. Believe it or not, you can make a few hundred or even a thousand dollars if its serial number is 09112001. To a non date collector or non collector of something tied to that date they are just another spender.
Famous Birthdays for that date: Stefan Kisielewski, Polish composer, writer and politician, born in Warsaw (d. 1991).
Sachchidananda Vatsyayan Indian journalist and author (d. 1987).
Louis Cottrell Jr., Creole-American jazz clarinetist and tenor saxophonist ( Heritage
Hall Jazz Band), born in New Orleans, Louisiana (d. 1978) https://en.wikipedia.org/wiki/Louis_Cottrell_Jr
Famous Deaths: Antonio Fogazzarro Italian writer/poet (Il Santo
Leila), dies at age 68. He was nominated for the Nobel Prize in Literature seven times https://en.wikipedia.org/wiki/Antonio_Fogazzaro
Events that week: https://en.wikipedia.org/wiki/March_1911