Indian 25-paisa coin

The 25 coin, popularly called Chawanni is a former denomination of the Indian rupee. The 25 paisa coin was worth $1/4$ of a rupee (1 rupee = 100 paise).

Introduction and Demonetization
The 25 Paisa coin was introduced in 1957. Prior to this, the 25 paise coin was known as the "$1/undefined$ rupee", which was equivalent to 4 annas (1 rupee = 16 annas). On June 30, 2011, the 25 paisa and all lower denomination coins were officially demonetised.

Features

 * Ferritic Stainless Steel was used to mint the 25 paisa coin.
 * The diameter of the coin is 19 mm.
 * Weight of the coin is 2.83 g.
 * In 1964-1983 the 25 paisa coin was minted in Copper-Nickel.