It was an accident, for I haven't seen IS-2 in a group of Soviet-origin tanks in a beginning of list.
I promise I'll check database before proposing new units next time
Maybe I'll finish what I have - although I think, I won't be fiddling with infantry platoons?... (there is quite complete history of infantry/MR platoon structures in Czech Internet, but it would demand creation of several new formations - which I can, of course, propose)
74 Strela-2 Team -
http://forum.presscont.eu/viewtopic.php?f=41&t=208 confirms information, that they appeared in CS from 1973 (now: 1/67). Might need change in formations' dates, for it is the only Infantry SAM (although now it appears is some units, that start at earlier date).
Strelas however weren't used in rifle nor MR platoons, which structures are described in Internet in detail. In bigger numbers, they became armament of AA platoons in motor rifle battalions, created only in beginning of 1980s (such platoon consisted of 3 APC, each with 2 Strela teams - http://forum.csla.cz/forums/thread/10.aspx )
82 M52 85mm ATG - proper pic is 25009 (this gun in Austrian service)
265 OT-64A SKOT - according to a book on OT-64, serial production in significant numbers started only in 8/64 and it was officially accepted only in May 1965. Therefore, earliest starting date should be around 1/65 (now: 1/64) (would need date change in formations). It had no fixed armament, only LMGs of troops' firing through open upper hatches.
272 LT-38G - in the Czechoslovak service it was just LT-38, without German variant letters. They were in inventory at least until 1949 (
http://vojenstvi.cz/vasedotazy_51.htm ) (now: until 5/47). According to this page
http://www.fronta.cz/lt-vz-38 they were designated post-war as LT-38/37 (for gun caliber), also a book on Czech AFVs confirms LT vz.38/37.
273 M5A1 Stuart - it's doubtful, that coaxial MG would be changed to Soviet one - IMHO it should be #67 Browning.
(It would be ideal to create also .30 BMG and AAMG, but I understand this is a waste of slots?...)
274 Cromwell - According to
http://vojenstvi.cz/verteneverte-2007.htm , they were stored until 1959 (now it's 55).
BTW: correct designation of weapons #29-30 7.9mm vz.35 CMG/BMG should be vz.37, at least in tanks like LT-38. Maybe it would be better to rename it as generic "7.9mm CMG/BMG", so that they cover vz.37, Besa and German ones?..
275 Challenger - picture shows Charioteer (I proposed picture of Challenger in other thread). Used - as above (although they were less numerous and might not survive as long, as Cromwell).
276, 286 Cromwell Mk.VI - according to a Polish book on Cromwells, HEAT round for 95mm howitzer was only experimental - it should be checked. If it's named Cromwell Mk.VI, maybe units 274 and 284 should be called Mk.IV?
300 Rifle Section - pic 11000 is empty(?) - proper is 23062.
Regards
Michal