No. 71, B.R.B. Basu Road, Room No. B- 529, Bagree Market, Kolkata, West Bengal - 700001,India
GA Lipika Abasan, AA-122 Prafulla Kanan (W), Krishnapur, Kolkata, West Bengal - 700101,India
Eser Mineral Complex, Muragacha P. O. Jugberia, Kolkata, West Bengal - 700110,India
No. 15, Rishi Bankim Chandra Road, Behala, Kolkata, West Bengal - 700034,India