Nice finds and congrats. You might post them on Coins to see if someone there may know a bit more on them. They are likely silver and have more value but there are others that would know more at a glance. I know people hate to lose things and if it was on top of the car and driven off and lost, would have been impossible to find and a kid might have found, popped out of the holders and spent them. If stolen, If there is no name, marking or other ID, hard to tell and I am not going to do anything other than say good luck with them, hope you do find someone with better knowledge of the values and keen eyes!