– In order to replace the T-34-85, Poland started to develop a new medium tank based on available concepts of Soviet tank building and original ideas. One of the variants featured a 100 mm gun mounted on the CS-52 turret. However, in 1968, T-55 production was launched in the country, and the project was discontinued. No prototypes were built.
A Tier VIII Premium Polish medium tank that is an alternative version of the CS-52 LIS with a gas-turbine engine. All other characteristics are identical.