I don't think they are going for accuracy, they couldn't even get the UK flag right even during that period of time it didn't look like that 🤦♂️
Discussion
What's interesting is that fiat currency has failed for both USA and UK.
Pure silver pound was temporarily suspended, mixing in less precious metals, resulting in failure and inflation. I believe the UK returned to pure silver as a consequence.
I don't know how long the pure silver dollar reigned, after that I guess came a period of gold backing until pure fiat was introduced.
Florines, ducats and gulden became famous and valuable currency for their high gold content, I believe 3,5 grams of pure gold.