Unique Instruments Corporation
No. 41, B. B. Ganguly Street, Near Central Metro Station
Kolkata- 700012, West Bengal (India)
E. H. Taher & Co.
69 A, N. S. Road
Kolkata- 700001, West Bengal (India)
Mercury Enterprises
No. 38, Ground Floor, Strand Road, G. P. O.
Kolkata- 700001, West Bengal (India)