German States
Nassau. Wilhelm Taler ("Kronentaler") 1825 PZ-CT MS66 NGC, KM48. A superlative piece, with dark old cabinet toning and prooflike surfaces with underlying blue iridescence that highlights the devices. It's hard to find other examples of this type for comparison because it has very few, if any, equals. For the condition-conscious 19th century crown collector, it really doesn't get any better than this specimen.
Estimate: 5000-6000 USD