That's right, my post should have had the / to distinguish between the S and M version.
As for numbers, it's confusing, here from sources;
and 1,000-1,100 T-90 MBTs of both the MS and Bhishma S variants in service,
The defense ministry concluded an agreement with the state-owned Ordnance Factory Board to license-build 464 T-90S main battle tanks.
thediplomat.com
The Army currently operates 1,100 T-90S tanks, of which 300 were directly procured from Russia.
India has awarded a $3.12 billion contract for local production of 464 T-90S main battle tanks after paying a technology transfer fee to Russia.
www.defensenews.com
There are currently around 1,000-1,100 T-90 MBTs of both the MS and Bhishma S variants in service, although the operational readiness rate of the tanks remains unclear. According to one estimate, 850-900 are of the T-90S Bhishma variant. Of the two, the T-
A good combo?
nationalinterest.org
In all, India plans to have 310 T-90S and 1,330 T-90M tanks in service by 2020 (total of 1,657 tanks by 2020).
The T-90 is a Russian third generation main battle tank.It is the latest development in the T-series of Russian tanks and represents an increase in firepower, mobility and protection. It is manufactured by Uralvagonzavod...
defenceupdate.in
The T-90S Bhishma is the main battle tank for the Indian Army. According to the Military Balance 2019 handbook published by the London-based International Institute for Strategic Studies (IISS),
over 1,025 T-90S tanks are operational in the Indian Army at present
www.globalsecurity.org
India currently operates 2011 T-90S which were procured in three separate orders.
Two batches (124 Russian built tanks and 186 tanks to be built in India in 2001 and a further 124 Russian built tanks and 223 tanks to be built in India in 2007) were purchased from Russia.
This $1.9 billion purchase of 464 new T-90MS tanks for 8 tank regiments at the Chinese border was approved in early November 2019.
ukdefencejournal.org.uk
At present
Indian Army is estimated to have
more than 1600 T-90 Bhishma tanks and these numbers
will cross 2000 by the year 2022.
Guarding India explained why T-90 Bhishma Main Battle Tank (MBT) is one of the deadliest tanks in the world. Check out our article to know.
guardingindia.com
Most say what you say i.e. around 1,500 T-90's, mix of variants. I also to believe this to be accurate, the other sources seem to have got things mixed up, hence my original post (2011 tanks).
That's actually good news i.e. they won't have over 2,000.