Combined Priming Flask and Wheel-Lock Spanner
From the collection of Cleveland Museum of Art. Free to download, adapt and use — no permission needed.
Early firearms required many tools and accessories for their proper use and maintenance. This clever design fulfilled a dual purpose as a spanner and priming flask. Small containers like this one would hold fine-grain gunpowder used to set off (or prime) the main charge in the barrel. A spanner would be used to operate a wheel-lock mechanism that enabled a gun to fire. On the gun, the jaws of the lock clamped a piece of flint or pyrites designed to rub against the rough edge of the wheel projecting into the pan. The wheel was revolved by a tightly coiled spring wound by the spanner and released when the gun's trigger was pulled causing sparks to ignite the gunpowder in the breech.
Cleveland Museum of Art’s own description
