Very nice find! I typically buy silver quarters, not find them. Back in the 2000s, one of my relatives told me to stop buying [ungraded] silver quarters, because I could find them in circulation.
By the way, don't spend them by accident! My brother was at our local bakery recently, and when the cashier opened the register to give him his change, he spotted a shiny 1964 in the drawer, and exchanged for it. Sad that someone used the coin for face value. Both of the coins you have are probably worth around $5 altogether.
