T-72M1 question

[Marek_Tucan]

Quick primer to T-72 variants:
T-72 (Ural) (steel front turret armor, 2A26 gun)
T-72A (composite front turret, laser RF, 2A46, no missiles yet!)
T-72M (export variant of T-72A, plain steel turret)
T-72M1 (ditto but with composites)
T-72AV )T-72A with ERA)
T-72B model 1986 (new armor, ATGM's, better FCS, Kontakt-1 ERA)
T-72B model 1989 (Kontakt-5)
T-72B1 (no ATGM)
T-90 (upgraded T-72B 1989)
T-90A/M/S (T-90 with welded turret)
T-72S (export, a bit of mystery what exactly is that).
Then there are various T-72M1M and so on.

Then there are differences. First series of T-72M carried 39 rounds as T-72, later carried 44 rounds etc. And with various manufacturers, detail stats varied - from what I've gathered, for example Russian tanks were being considered as having best optics and armour, Czechoslovakian as having better IR kit etc.
Re armor, T-72M1 got from the very beginning an additional 17mm HHS glacis plate (after fears of new 105m ammo) whereas with T-72M and T-72A, only late series got it from the beginning and earlier machines were fitted with it later.