No, no, I mean that A there…
](https://micrio.thingsthattalk.net/VZhql/views/max/640x640.jpg)
Fig. 1. Coin of the same issue without the mysterious A. Silver siglos of Stasioikos I (450 – 400 BCE) - NumisBids Auction 114
That’s graffiti! It was not part of the original design of the coin and it is unclear whether it was engraved in ancient or modern times. Countermarking, meaning marking a coin with a symbol or stamp other than the original issue, was a common practice in the ancient world, used either to renew the guarantee of the coin’s value or to reevaluate the coin or for other - personal - reasons.