Knowing the 2001 rate helps you compute the Indexed Cost of Acquisition under the Income Tax Act. For a property bought in 1990, you can use the 2001 rate as a benchmark fair market value to reduce long-term capital gains tax drastically.
While the Maharashtra government’s portal primarily hosts recent data, you can still find 2001 information through these free and low-cost methods: ready reckoner rate mumbai 2001 free