(DIAMONDS.)

Group of 4 volumes on the diamond industry in Holland and Belgium. Illustrated. 8vo, various bindings. Condition good. Mostly Amsterdam, early 20th century Diplomatic and Consular Reports #634: The Diamond Industry of Antwerp. London, 1905 * Asscher's Diamond Works. "Important historical data"--Sinkankas 229 Amsterdam and Paris, 1928 * Heertje. Di Diamantbewerkers van Amsterdam. Amsterdam, 1936 * Wolfs. Het Diamantbedrijf in zijn onderdelen. (Antwerp, circa 1938).