Originally Posted by
fastair
Currency paid and points of sale are not the same. Often intl fares are different based on certain fares being made available for purchase in 1 country and not another, and they are not related to the currency paid.
Is the OP's question "can I pay in a different currency?" or "Can I purchase a fare that is targeted for a particular point of sale from a different country?"
Point of Sale is the primary question and not necessarily currency type.
CO.bomb effectively does this for ex-India tickets - one can choose Country, and then the fare basis and the associated pricing does indeed vary...
However, solely using this observation cannot confirm that this is a POS variation - it most probably is, but may not be.