1 s. On 1 Mark till 5 s. On 5 Mark imperial yacht with overprint "C. E. F. ", in perfect condition mint never hinged, the two of them top values always from margin of sheet, issued only 1.880 sets, unsigned, photo expertize Scheller (2017) : "Authentique et sans defaut. " = "genuine and immaculate", Michel 2.010.- Euro (undervalued, hardly once in unhinged mint condition offered! )