KM-477 variety, Brunswick-Wolfenbüttel type. Struck at the Zellerfeld mint to commemorate the death of August the Younger (1604-1666).
One of the most striking and dramatic designs in world coinage, with a skull at the base of a dying tree.
And this is an absolutely fantastic, original example with colorful old toning and much luster remaining on the obverse and reverse.
This coin is from the CRO archives and is not currently available for sale.