Watch List notes:

German States - Frankfurt Three Kreuzer 1856, as KM#334, the 5 of the date struck over a very small 5 (possibly from the One Kreuzer punch) the underlying 5 too far to the left with around half being fully visible, UNC and fully lustrous, the obverse prooflike, a very unusual overstrike

Estimate: 25-75 GBP