Great Britain
Victoria full brockage Halfcrown 1880, S-3889, KM756 for type, "Brockage Mint Error" AU55 NGC, mirror incuse image of obverse on the reverse, including the date; golden gray toning. A rarely seen error when all details are present.From the collection of Donald E. Bently, sold for the benefit of the Bently Foundation
Estimate: 900-1200 USD