A cloak clasp by Fabergé

A cloak clasp by Fabergé, the two hooked gold sections decorated with pink guilloche enamel within seed pearl borders, the shaped section set with a small circular cut diamond. With gold chain and swivel clip, on black silk. The larger section stamped AH for August Holmström, and a separate stamp with Kokoshnik and 56. The smaller section stamped separately with Kokoshnik and AH (slightly obscure). The swivel clip with obscure marks of different initials and probably 56. 3.5cm wide.