Portrait of a lady, seated three-quarter-length, in a black dress with red slashed sleeves, lace cuffs and a ruff

Thomas de Keyser (Amsterdam 1596-1667) Portrait of a lady, seated three-quarter-length, in a black dress with red slashed sleeves, lace cuffs and a ruff signed with monogram 'TDKF' (TDK linked; lower centre, on the chair) oil on panel, octagonal, inset into a rectangular panel 10¾ x 8 7/8 in. (27.5 x 22.5 cm.)