When I see things like this, I always like to imagine when, in the full richness of the coins life, the need for a button became more important than having the coin. East India Company, 1 Quarter Anna. Even with the coin in hand I can't decipher the last digit of the date
If I had to guess, the date of your coin is probably 1835. https://en.numista.com/catalogue/pieces4849.html