[Photo 3 - A Pz Kpfw III Ausf. F with very crudely applied winter camouflage (probably white-wash) over Dunkelgrau. Notice how, despite the rather poor application, it does a decent job of breaking up the vehicle's outlines.
The Ontos ("Thing" in Greek), officially the Rifle, Multiple 106 mm, Self-propelled, was an American light armored tracked anti-tank vehicle developed in the Used exclusively by the Marines. Via ~ The NAM