Gold tone and robins egg blue enameled Arithmetic pin very Art Nouveau looking. Open C clasp with pin that extends beyond the front indicating an older pin. Gilt cross appears in blue enamel and the word "Arithmetic" in gold letters upswept on an enameled panel. Measures 3/4" long by 1/3" at widest point. This is within a few millimeters (I need a prescription change!)
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