Aachen Zwitter 1 Mark 1645/1648

Here are the previously sold Zwitter coins with clear indication on obverse '1648', and dotted hat of Carl. There will be other differences as well upon close inspection I think.

and the other

Thanks tdziemia! Indeed maybe from the 1 mark https://en.numista.com/catalogue/pieces267371.html Unfortunately no pictures included on Numista.
So - that would mean a unique find?

I read from Numista the reverse lettering: MON NOVA VRBIS AQVISGRA I MARCK 1643 or ACH

So - not 1645?

Yes the first picture is from the live WAG auction.

First, I said 1643 was a known date, but now I see that I am wrong about this being a possibility for a mule.
If we look at #156 on the Aachener Munzen website, we see that the 1643 1 marck has the date on the reverse only.

After looking more closely at other examples of 1648/1645, I also do not like this option. In the 1648 obverse, the scepter is held vertically, very close to the head, and intersects the beaded inner circle. The obverse of the coin in the current WAGO auction does not look like this (the scepter is held at an angle and is a bit away from the head, and is within the circle). Of course there is the possibility of another 1648 die, but with so very few examples surviving, the better assumption is that there was only one die, and this does not match.

Maybe 1645/1645? The ducat with a 1645 obverse looks close to this obverse. But this raises the point of whether the ducat and the 1 marck coin would have been the same size.

Very interesting coin. I did not understand at first your comments on the rarity, but after looking through the website link, I see what you mean.
Possibly an unlisted type?

Of course, the helpful information which we are lacking is the size of the coins.
The gold ducat was usually about 21-22 mm (assuming this type was copying the Dutch one).
We don;t know the size of the 1 marck coin. Numista has the weight of a slightly later one at 0.75 g., so it was probably a rather small coin.

Since I can't find the size of any of these Aachen coins, I looked nearby in Cologne. The late 17th century 2 albus coin of 1.6 g. had a diameter of 24 mm, so I guess it is not out of the question that the die sizes could have been close on the two Aachen types (ducat and 1 marck).

It will be interesting to see how the auction goes. On the one hand, it is probably a coin with a limited number of interested collectors. On the other hand, I think the German numismatic market is quite an active and astute one (and it is a German coin in a German auction). I haven't bid on a Gerrman coin in 3 or 4 years, but I never got one as low as I had hoped. If the price goes crazy, it probably confirms that other bidders have also decided it is a previously unknown variety.

It's not clear to me why WAG assigned the 1648 date for the obverse, when it seems you were quick to determine that is unlikely. Most of the auction houses handling large numbers of coins are making an occasional mistake these days, but not usually on coins "in their own back yard." But as we see, if the person doing the attribution was working only from catalogs, this would have been the only choice ...

I see that it sold at the opening bid. Was that you?

If yes, congratulations.