Work: about 10,5 cm (Dia., the photo portrait)? Frame: 19,4 x 18,5 cm? Signed 'Koller's Nachf. / Budapest 1898'.? Provenance: 'Die Fürstliche Sammlung Thurn und Taxis', Sotheby's, Regensburg, October 1993, lot 1637 (StE 764). ? ? Work: 3,1 cm (Dia., the miniature portrait)? Frame: 4,7 x 4,7 cm? ? ? ? ?