old 18kt gold cufflinks. 19th century cufflinks in hallmarked 18-carat yellow gold, oval shaped, chiseled with a decorative pattern on the two buttons, weight 4.59 g. under a magnifying glass, we can see half an eagle's head, which corresponds to the French carat hallmark.. superb old patina. Work. The cufflinks are hollow, no defects noted. Dimension of the main pattern, approximately 1.8 cm from water to 1 cm wide. Dimensions of the secondary motif approximately approximately 1.8 cm long by 0.4 cm wide, length of the chain with the attachment rings approximately approximately 1.2 cm #BoutonDeManchettesor #boutonsmanchettevintage