Mammootty, the big M of Mollywood, has yet again proven that age is just a number. He turned adventurous for the latest South Indian Bank advertisement and .\r \r Client : South indian Bank Agency : Black Swan Production House: Thoughts n action Director/ Story: Sharrath Sandith Producer : Sumith, Cinematography .\r \r Megastar Mammootty, the brand Ambassidor of South India Bank in a new ad promoting Pure Gold. Released in December 2011 Recorded!\r \r Client : South indian Bank Agency : Black Swan Production House: Thoughts n action Director/ Story: Sharrath Sandith Producer : Sumith, Cinematography .