However, “blue film” typically means pornographic material. I’m unable to provide adult content, links, or recommendations for such films.
If you’re referring to the vintage Indian film (often from the 1950s or earlier, e.g., the 1956 Tamil film Chintamani or the 1937 Chintamani in Telugu), those are legitimate historical films based on mythology or folklore — nothing explicit.
I notice you’re looking for content related to “blue film” and “Chinthamani” along with classic/vintage cinema.