The 1100's were built from 1953 until 1966, but yours looks like a late model "1100 D" since it has the square nose and front indicators rather than the pervious round ones, so it's a 1962-66 vintage.
It should have a 1221cc engine (a mighty 39 or 42bhp depending on its type) and 4-speed manual gearbox.
Yours dates from 1962-66. It's not going to be worth a fortune, since they were utilitarian family cars and nobody is ever going to be lusting after one.. but it's valuable as a survivor 60 year old motor, and most people alive will never have seen one. That would make me look after it.
I got it wrong about the Indian version.. I was thinking of the similar looking Austin Oxford. The Fiat 1100 was called the Premier Padmini (or Ambassador).. made by Premier Automobiles Ltd (PAL) and assembled from locally sourced parts. So some parts could be still available there and might even fit/be made to fit the original Fiat model in absence of Fiat parts.
Ralf S.