(mining Division) Industry House, 18th Floor, 10, Camac Street,, Kolkata - 700017, West Bengal, India
No 7, Rafi Ahmed Kiwdi Road,, Kolkata - 700013, West Bengal, India
No.21b, Belvedere Road,, Kolkata - 700027, West Bengal, India
33, Bipin Ganguly Road, Ground Floor, Dumdum,, Kolkata - 700030, West Bengal, India
1/1a, Dilarjung Road, Cossipore,, Kolkata - 700002, West Bengal, India