Indian or Arabic coin

Hello,
Could you help me on this coin?
weight: 1.8g
diameter: 1.3cm
Metal: Silver



Thanks

Around you find the names of the four caliphs:
Abu Bakar, 1e caliph
Omar, 2e caliph
Usman, 3e caliph
Ali, 4e caliph

On one side of the coin, I think, is one of the six kalima's
http://en.wikipedia.org/wiki/Six_Kalimas

I am sure Sujit will help you.