1878 4kr. blue, selection of fifteen used singles, showing an array of colour and shade variations including the scarcer grey blue shades, few minor faults, generally fresh and very fine, all neatly mounted and written up on an exhibition page, some signed Sadri (15) (Persiphila $2'600+) (Image)

1878 4kr. blue, unused horizontal strip of three, from the setting showing positional types 'ACD', good to large margins, generally fresh and very fine, a rare strip, signed Sadri (2) (Persiphila $4'000) (Image)

1878 4kr. blue, used horizontal strip of three, from the setting showing positional types 'ACD', good to large margins, generally fresh and very fine, a rare strip, signed Sadri (2) (Persiphila $4'000) (Image)

1878 4kr. blue, used rejoined horizontal strip of three, from the setting showing positional types 'ACD', good to large margins, generally fresh and very fine, a rare strip, signed Sadri (3) (Persiphila $4'000) (Image)