Round in shape, the one rupee coins weighs 3.76 grams (58.0 grains), has a diameter of 21.93-millimetre (0.863 in) and thickness of 1.45-millimetre (0.057 in).

Sher Shah Suri, the founder of the Sur Empire ruled North India from 1540 to 1545 AD.

The denomination remained in usage through the Mughal, Maratha, East India company and British rules.

[2][7] Composed of 91.7% silver, the new one rupee coins weighed 11.66 grams (179.9 grains) and had a diameter of 30.55 millimetres (1.203 in).

The reverse of all one rupee coins minted after 1835 and before 1862 AD bore "East India Company" instead of the Mughal Empire.

Edward VIII was never featured on any one rupee coin since his reign (Jan-Dec 1936 AD) was short.

As did: Alwar, Ambliara, Awadh, Bahawalpur, Bharatpur, Bikanir, Bund, Chuda, Dhar, Indergadh, Jaisalmer, Jaora, Junagadh, Kalat, Kutch, Mangrol, Mengani, Muli, Mysore, Nawanagar, Palitana, Rajkot, Ramgarh, Sailana, Sayala and several others.

[13][14][15] On 15 August 1947, India obtained independence and the monetary system and coinage of the British Raj were retained.