Need and accurate measurement of bullet diameter, overall length, and to see the base of the cartridge to see if it is rimfire. No doubt it is an older style cartridge. Cool find.
Hard to tell without dimensions or any case markings but if they are centerfire they appear to be .32 or .38 Smith and Wesson cartridges. These are still manufactured but case markings could help determine the age. Could also be .38 Short Colt but definitely not .44 Henry.