1 Thaler - August

August the Younger, Duke of Brunswick-Wolfenbüttel, died in 1666 at the age of 88 — one of the oldest ruling princes of his century and the bibliophile behind the Bibliotheca Augusta, which at his death was the largest library in Europe. This thaler was struck in the final years of his reign, when the duchy had largely recovered from the devastation of the Thirty Years' War and August was still actively directing both court affairs and his famous book acquisitions.

The Welter 802 attribution places this firmly within the late ducal series, distinguished from earlier August thalers by subtle die characteristics that Welter's corpus documents across multiple obverse and reverse pairings for the 1664–65 window.