This sculptural and usable lamp is of cast brass. The central sculptural element above the oil pan shows the goddess Lakshmi, lotus flowers in two hands, sitting cross legged on a lotus flower. This is a common depiction of Lakshmi in Kerala and Tamil Nadu in India’s south.
Her lower two arms have a shower of gold coins

Lakshmi, Vishnu’s consort, is the goddess of wealth and prosperity. She is associated with light, hence the association of her image with lamps. The festival of Divali (the ‘festival of light’) is staged across India each year in her honor.

The lamp here is of good size and heavy. It would have served as a focal point in a home pooja