Hi
I think these two issuers:
https://en.numista.com/catalogue/kallatis-1.html
https://en.numista.com/catalogue/kallatis_thrace-1.html
...are technically the same. Same Greek city, some catalogs list it in Moesia, some in Thrace.
Moesia// Kallatis even has Thrace Drachm as currency.
e.g. this coin, AMNG#196:
https://www.acsearch.info/search.html?id=5962495
https://www.acsearch.info/search.html?id=384801
one is listed in Thrace, one in Moesia by different Auctioners. CGB even explains that Callatis was situated in Moesia inferior, even if it is listed in Thrace
I propose keeping them in Thrace, as Istros is already there.
But Moesia is more popular, it returns 685 pieces on acsearch, and Thrace only 381.
Thanks
strato