Jean-Urbain GUÉRIN (Strasbourg, 1761 - Obernai, 1836) Presumed portrait of François Christophe Kellerman (1735-1820), first Duke of Valmy and Marshal of France Watercolour and gum arabic on ivory, oval shape Signed 'Guerin' on the left CIC n° 2024/BE01901/CE Gilded copper frame decorated with half-pearls, locks of hair on an opaline glass plate on a guilloché leaf background with a blue glass tondo on the reverse, inscribed 'L'amitié' (Friendship). Presumed portrait of François Christophe de Kellerman (1735-1820), watercolour and gum arabic on ivory, signed, by J. - U. Guérin 3.07 x 2.56 in. 7.8 x 6.5 cm Provenance: Anonymous sale; Geneva, Sotheby's, 7 May 1982, no. 327 (sold for CHF 8 000) ; K. Collection, Hanover ; Anonymous sale; London, Christie's, 27-28 November 2012, no. 322 (sold for £10 000) ; Pierre Jourdan-Barry Collection (1926-2016); Then by descent; Private collection, Belgium Jean-Urbain GUÉRIN (Strasbourg, 1761 - Obernai, 1836) 7.8 x 6.5 cm