As per my knowledge plinthed steam locos are found at
1.Rail Nilayam Secunderabad Sir Alec
2.Hyderabad Bhawan YP
3.Kazipet jn railway station outside
4.Aurangabad Railway station outside
5.Vijayawada...
more... railwaystation outside Fairy queen
Locos at GNT, GTL,GY are models I feel.
Please post about any new locations in SCR which have Steam locos plinthed outside