A collection of rings

A collection of rings, comprising: a late 19th century diamond five-stone ring in yellow gold, stamped 18ct, size N, case; an emerald and diamond cluster ring in 9ct gold, London import marks, size M, case; a sapphire and diamond half-hoop ring in 9ct gold, London import marks, size K 1/2, case; and a sapphire five-stone ring in 9ct gold, Birmingham hallmarks, size P, case