I have a 5 Mark of known provenance.
It has been in our extended family, almost from the date when it was issued in New Guinea. It was given to me by a great aunt, who is long since deceased. She was born in New Guinea, the daughter of a Methodist Missionary and had a birth certificate written in German. She and each of her 3 brothers were given one coin each by their father, who kept them in safe keeping on their behalf, until his death in 1948. I disposed of one of the other coins, under instruction, to auction in 1988. It realised $500.
The coin that I have was given to me; I was favoured, being a coin collector.
I have compared the coin on the screen with the one in my hand.
I agree with swamperbob. The coin is most probably pressure cast, and has faithfully copied the wear pattern of the original.
This one of the main problems in passing judgement on a coin that has been imaged to the screen. On the screen the coin looks OK to me, except for the comments already made. My coin is is as Krause
27.78 grammes. But if it is only 22.6 grammes, it has to be a fake.
Wear with these coins, (on the reverse), first shows up on the breast feathers and the leading edges of the wings.