The last one is not ancient, but (relatively) modern Indian. The conch shell in the bottom picture is very typical of southern INdian coinage from the period 1600-1800, notably around the Dutch colonies such as Cochin. I can;t spot an example featuring a half-figure of Vishnu or whoever that's supposed to be. It's possible that that was carved into the coin at a later time.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis