A Soviet long distance 4 meter by 4 meter target, made of many wooden planks.
An American target, made from cloth and a wooden frame. It is much lighter than the Soviet one, as it is meant to move around for training exercises.
And now, a more modern one. Livejournal user deletant discovered it on an abandoned proving grounds in Russia.
This device moves back and forth over a rail of BMP tracks using an electric motor, and was likely used to carry a target back and forth. Click the link above to see many more photos of the proving grounds, including abandoned ISU-152s used as stationary targets.