A LARGE GERMAN COW-HORN GUNNER'S POWDER-FLASK finely engraved with the figure of Mars within martial trophies and with two cannon, all within a landscape on one side, and with a gunner in contemporary costume, and four cannon within a landscape on the other, and dated 1615 (old crack), plain wooden base-plate, and faceted horn nozzle with wooden stopper, dated 1615