Congrats on your finds, and thank you for sharing!
My grandmother was a bank teller for 23 years in a small-town farming community. Even in a small-town farming community she managed to accumulate a fair number of silver coins during her career. She earned very little money by the hour, and her pension was only about $100/month when she retired. Being a bank teller is not a lucrative position. I'm guessing your teller position is also not very lucrative "by the hour". Enjoy your occasional silver finds!