Dutch Master Circa 1460/70 The Annunciation. Oil tempera on wood. 37,5 x 25,5cm. Framed. Provenance: Private collection, NRW. Results of the non-destructive ultraviolet-visible spectroscopy by Dr. Doris Oltrogge of the Institut für Konervierungs- und Restaurierungswissenschaft der FH Köln of 04.09.2009 states: "The basis of the anaylised pigments were well known and readily available in the 15th century, the palette does not appear unusual in comparison to other panel paintings of the 15th century done north of the Alps."