This tank is armed with the Marlin tank machine gun in the original ball mount. The driver was provided with a nonrotating vision cupola with vision slits. The axle for the idler wheels can be seen on the front bow plate, and the suspension springs were protected by plating. (Picture from Development of Armored Vehicles, volume 1: Tanks.)
This vehicle is armed with the Browning machine gun in the redesigned ball mount. The gunner had a rearward-opening hatch on top of his position, but the only entry and exit was provided by the hatch in front of the driver. The leaf springs for the track return rollers can better be seen in this image. (Picture from Tank Data, vol. 2.)
The tailpiece that assisted with trench crossing can be seen in this picture. An air intake louvre for the engine surmounts the rear hull, and an engine exhaust pipe exited on each side of the rear of the hull. Also note the arrangement of the sprocket teeth, with two teeth grouped together to grip the track links.
The hinges on the top of the crew access hatch can be better seen in the light in this image. The armament in this machine is a replica.
The rear of this tank was redesigned to improve cooling, and the engine exhaust pipes were rerouted to exit the tank behind the drive sprockets. (Picture from Development of Armored Vehicles, volume 1: Tanks.)