Those cartridges are indeed .44 S&W American cartridges, probably from dating from the late 1930's to the early 1940's production. The cartridge was originally a black powder number, but was loaded with smokeless for a couple generations in the 20th century.
The .44 S&W American was developed from the .44 Russian (also produced by S&W) and chambered in their break-open revolver patterned after the .45 Schofield revolver accepted by the US Army in trial quantities in the 1870's. Both cartridges predate the .44 Special, and the .44 Magnum. All share the same case head and rim dimensions but differ in length and power.
Value is probably $1 or $2 each. A cartridge collector would find them interesting, but not rare.
HTH
John