A rectangular gold concave and convex buckle

A rectangular gold concave and convex buckle, centred with a moonstone within a rose cut diamond surround, on a mauve guilloche enamel ground, with white and gold enamel decoration and two colour gold branches to each quarter, gilt metal bars to the reverse and with extra buckle section. In fitted case by Noble & Co, Pall Mall Safe Deposit. 6.3cm wide.