Dear Sir, 1.Does your guruji work on 1961 brass and 1962 copper 1 paisa coin. 2. Does he work on 1985 big coin. 3.Will 12 nails tortoise work. I have many old coins and notes.I know there is special demand for particular coins and notes.But if other coins or notes pass the same test will it work. Please tell me all tests. 1.Does evers coin has to pass same set of tests or there are different tests for differents coins. 2. What are the tests for notes.( I have heard of torch test but I want detailed test procedure)