The consensus on these seems to be they're fake.
The "WaA63" stamp is copied from a stamp the Nazis used on weapons, not on bullion. Further, the "WaA63" stamp did not begin to be used until 1943, so it's presence on a piece of bullion dated "1942" is not just wrong, it's anachronistic.
Most of these "fake Nazi bullion" pieces use a crude swastika-and-reichsalder symbol, just to drive home the whole "it was the Nazis!" theme. But I suspect the bizarre quasi-Nazi normal-cross-and-reichsalder symbol on this piece was used specifically to allow the pieces to be sold in jurisdictions where the selling of replica things with the swastika on them is illegal.
In this case, I believe "08082018" might be a more reliable indicator of the date of pouring.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis