3. Quenast - Bruxelles, S.A. des Carrières de Porphyre de Quenast, s.d. (after 1927), in-4°, 43 pp, black/white illustrations, sewn, printed wrapper over publisher's stiff boards. Finely produced trade catalogue of the stone quarry of Quenast, producers of the famous belgian paving stones ( cobblestones). The quarry is situated ca. 25 miles south of Brussels. When this catalogue was published the quarry was the world's largest producer of cobblestones. Until the late 1960's allmost all belgian roads were constructed with these Quenast porphyry paving stones. Text in French. Livre en français.