18K (750) white gold and platinum jabot pin, one end set with an old-cut cushion diamond surrounded by black enamel, set with rounded old-cut diamonds. French work, circa 1925. Diamond dimensions: approx. 11.9x10.6x8.2 mm. Length: approx. 8.2cm. Gross weight: 12.4g (shock, chips). A 1925 french jabot pin