Only opinions of amateurs. They have heard, like me, that it's called German variant. But there isn't any official document about this.
There are many documentation about other coins minted abroad. The name of the minting companies, quantities, dates and names of the ships that landed them. All is in the newspapers of the day. The Bank of Spain ordered those coins with permit of the Government.
But nothing about this coin.
Referee for Spain, Iberia (ancient), Suebi Kingdom and Visigothic Kingdom