Two Glass Open Jewel Trays, fourth quarter 19th century, the first a C. F. Monroe gilt-brass-mounted opal glass circular spiral-ribbed open jewel tray, and the second a similar Wave Crest example, one of the two signed on the base, h. 1-3/4", dia. 4-1/2". For the form, see W. R. Cohen, Wave Crest, The Glass of C. F. Monroe, Collector Books, 1987, p. 108, upper photograph. Two Glass Open Jewel Trays, fourth quarter 19th century, the first a C. F. Monroe gilt-brass-mounted opal glass circular spiral-ribbed open jewel tray, and the second a similar Wave Crest example, one of the two signed on the base, h. 1-3/4", dia. 4-1/2". For the form, see W. R. Cohen, Wave Crest, The Glass of C. F. Monroe, Collector Books, 1987, p. 108, upper photograph.