DIDEROT (Denis) - SAUVAGE (Sylvain). Les Bijoux indiscrets. Paris: René Kieffer, 1923. - In-8, 258 x 198: (4 ff. first blank), 255 pp. (2 ff. last blank), 25 plates, printed cover. Green half-chagrin with corners, spine decorated with gilt and mosaic motifs, gilt head, untrimmed, cover and spine preserved (period binding). Edition of 600 copies on vellum, illustrated with 25 original color etchings out of text by Sylvain SAUVAGE (1888-1948). ONE OF THE 50 FIRST COPIES comprising 4 states of the plates, including the pure etching on japon, and an original watercolor signed by the artist (no. 39). It is enhanced by an original unsigned erotic drawing in ink on japon nacré. Spine and top edge of boards faded. Provenance: Pardo de Leygonier, with bookplate.