1. In what dates the Rs.100 Non-Judicial Stamps paper print was changed, during the year 1960 to 1990.
2. In which date the font of the denomination, which is printed above( top right corner) the stamp area was changed from Rs.I00 to Rs.100 (the digit I to 1)
You can file a RTI application with the PIO. Details of PIO will be available on the website of the organisation/department, under the "RTI" link. Or simply call that office and ask "Who is the PIO in your office under the RTI Act 2005. I want to file a RTI application." ?
Your RTI Application has to be as per the RTI Rules and Fees for Andhra Pradesh.
These are available in the Guide section of the Portal: RTI Guide
Please read the other articles in the Guide section as well as the links given in the FAQ here: RTI FAQ
These will be of help to you during the RTI process.