The first image is of the 3 pounder, Vickers Maxim, casemate, usually used on ships for patrol boats, it's now converted into an anti-tank cannon. The next one is of the actually Medium VIckers III, one turret, two mg turrets and some treads. The last one is of a detailed layout of the Mark III, including side views, rear view, frontal view and top view. Anything else, just ask.
