Ducat - Frederick William III pattern

Neuchâtel occupied an odd constitutional position in 1800 — nominally a sovereign principality under Prussian rule since 1707, yet surrounded by Revolutionary France and under enormous political pressure. Frederick William III had inherited the title just three years earlier, and this pattern ducat appears to have been produced as a trial piece rather than for circulation, likely testing whether a local gold-denomination coinage was even viable given the instability of the moment. It never was: France absorbed Neuchâtel entirely by 1806, handing it to Marshal Berthier.

Bleached billon — base metal chemically treated to approximate silver — is an unusual choice for a pattern of this denomination, suggesting cost rather than intent to deceive.