These mould blown shakers modeled as individual die are quite difficult to find, and perhaps even rare as a matched pair. Perhaps you can see that one of them (left) is a pale yellow while the other (right) is white, which may be intended to distinguish one as salt and the other as pepper. These are in all respects high quality pieces with heavy enameled hand painted flowers done in red, blue, and white. One example is shown in Lechner's The World of Salt Shakers, p. 112 who notes it was patented by Joseph Locke, December 3, 1889, and reprints the patent papers for the design No. 19,460, p. 269. The maker was the W. L. Libbey & Sons Company, Toledo, Ohio. The dice are 1 5/8 inches square. With the metal top removed, they measure 1 3/4" high.