Yagam (1980)
Yagam is a 1980 Malayalam black-and-white film directed, produced and co-cinematographed by Sivan and starring Babu Namboothiri, Premji, Kalpana, Aranmula Ponnamma, and Jalaja. The film won the National Film Award for Best Feature Film in Malayalam. O. N. V. Kurup won the Kerala State Film Award for Best Lyrics for the song "Shravana Sandhyathan". Sivan and Mahesh won the Kerala State Film Award for Best Photography (black-and-white).
More at Wikipedia.