The Perunchellur copper plate of Kōlattiri Karumpattu Irāman Iravi, AD 1150.

Copper-plate is inscribed on both sides of the sheet; the document is a record of money borrowed by the Kolattiri, king of Kannur in North Kerala, and the temple committees of Perumchellur, from a private landlord mortgaging vast estates of land. The date is the middle of the 12th century. [Source: unpublished transcript of the document by Raghava Varier and Keshavan Veluthat (1976) and revised by Kesavan Veluthat, Reader M.A., M. Phil., Ph. D. Ancient India and Epigraphy, (2004)].