These were general revenue stamps. You won't find them in the general postage stamp catalogues, although they are listed in the Barefoot catalogues of Commonwealth revenues. The low values like yours are only worth a few cents each: they were used in huge numbers.
This is what the full version of your embossed cancellation looked like:

There were other types as well:

(This 500 Rupee stamp was equivalent to about $US200 at the time.) And some more values:
