A pair of French gilt-brass and guilloche enamelled opera glasses, late 19th century, the bodies and handle enamelled with gilt thistle motifs on a turquoise ground, with mother-of-pearl eyepieces and focus wheel, 11cm wide, together with a pair of French gilt-brass and baby blue guilloche enamelled opera glasses, with handle, late 19th century, 9.5cm wide (2) A pair of French gilt-brass and guilloche enamelled opera glasses, late 19th century, the bodies and handle enamelled with gilt thistle motifs on a turquoise ground, with mother-of-pearl eyepieces and focus wheel, 11cm wide, together with a pair of French gilt-brass and baby blue guilloche enamelled opera glasses, with handle, late 19th century, 9.5cm wide (2)