As you Asking for the Contact Detials of the Nassau Offshore Banking Unit (OBU) of the State Bank of India the details of the branch is given below

Contact Details
State Bank of India Bahamas
NASSAU OFFSHORE BANKING UNIT (OBU)
Mr. Shamsher Bahadur ,
[SBI] P.O. Box N-3118 Suite # 201,
Saffrey Square Bay Street,
Nassau, TheBahamas – BAHAMAS
Tel : (001) – (1242) 326 2485 , ( 1242 ) 3262772
Fax 1242) 326 3969

For knowing the Details of the Any other Country branches of the State Bank of India you may Visit the Official site of the Bank

The page may look as follow

State Bank of India



There At the Bottom of the page you may get the Menu of branch Locator click on it , After clicking you may Redirect to the page from there you may get the Details of the Any other branches of the State Bank of India

For your convince Here I am giving you the Snapshot of that page

State Bank of India Branch Locator