Very cool. It's from the city of Regensburg, Germany. The one in my picture sold to a collector for $220 US dollars. A coin dealer would probably pay one-half that amount.
Here is the full description from the auction catalog (AV = AU = gold, ND = no date):
Stephen Album Rare Coins > Auction 41 Auction date: 16 September 2021
Lot number: 1584
Price realized: 220 USD (Approx. 187 EUR / 160 GBP / 204 CHF)
REGENSBURG (CITY): AV 1/32 ducat, ND (ca. 1750), KM-357, Fr-2545a, Beckenbauer-529, Crossed keys // crowned R, Georg Christoph Busch mintmaster, trade issue, NGC graded MS64. This is one of the smallest gold coins of the world.
Estimate: 175-275 USD
Starting Price: 160 USD