The following is from a thread on the GUNS.RU forum:
The thread was started by member “Eng. Den”, if you open the thread and use Google translator much of the conversation concerning replica cartridges being made and sold in the Ukraine is understandable. It appears these REPLICA cartridges are not marked to identify them as replicas.
Below are some of the photos posted by “Eng. Den” to show examples of the replica cartridges.