Marcello, judging from Czechoslovakia:
At first came T-72 "Ural", directly from the USSR. Stereo RF etc. Never upgraded to LRF (or smoke dischargers etc) , but OTOH there were just 30 pieces delivered.
T-72M-E2 - T-72A glacis, "gill" sideskirts, plain steel turret, 39 rounds (as in T-72), LRF. Smoke dischargers may be added to some pieces later, ditto for HHS.
T-72M-E4 - glacis with HHS plate (17mm), full-length skirts, plain steel turret, 44 rounds, LRF, smoke dischargers.
T-72M1 - glacis with HHS plate, full-length skirts, composite turret (sandbars), 44 rounds, LRF, dischargers.
To make matters worse, army often calls all T-72 (except the old ones) "T-72M". Funny, innit?
