Olbia bronze – unusual weight (9.55g)

Hi everyone,

I need help identifying this bronze coin from Olbia (Black Sea region, Sarmatia). It weighs 9.55 g and measures 18 mm.

Most similar types I’ve found (330–250 BC) weigh around 4.5 g, which makes mine unusually heavy.

➡️ Could this be a different denomination (double unit?) or a variant?
Any references or known examples close to this weight?

Thanks in advance for your help!

Best regards,

Hi, the weight is good, there are different types for this coin

https://www.acsearch.info/search.html?id=8721040