The two right had projectiles are 1 pdr. subcaliber types, the one you mention as having Navy markings if dated 1917 is in the correct case. The Navy reloaded cases and older cases can be found on later projectiles. The Driggs 37x136r case was loaded with a Driggs projectile which is base fused and flat tipped common shell, these can be early 1890s Navy issue or commercial export. I will attach the picture of the subcaliber cannon as used. I have posted a discussion of U.S. Navy subcaliber projectiles on the Projectiles section, if you can find it it should help.