Golden coin

golden coin front

golden coin reverse

One very hard to deteminate 24 carat gold coin with a crown and two crossed swords at the top. In the middle circkel some figures of animals or ......
Can be a Byzantium or Arabian gold coin.
Maybe there is anyone who can tell me what kind of gold coin it is.
I detected it on a field in the context of Roman and early middle ages.
Where the coin is scratched there's a red color coming trough but we tested te red material with 21 carat gold testing liquid and the line didn't disappear. So it has to be all pure gold in the item. Size: 17 mm. diameter.
Weights: 0.4 grams.