My guess is that hammered coins allow for more detail and are harder to forge, even if the resulting coins aren't perfectly round. From this[1] it looks like e

My guess is that hammered coins allow for more detail and are harder to forge, even if the resulting coins aren't perfectly round. From this[1] it looks like early coins were also cast in the West before changing to hammering. [1] https://en.wikipedia.org/wiki/Mint_(facility) https://en.wikipedia.org/wiki/Mint_(facility)