A gold dress ring by George Tarratt Ltd., 1964, the polished zig-zag in 9ct gold, maker’s mark ‘G.T.L’, Birmingham hallmark, maker’s case, ring size J-K. £200-£260

George Tarratt established his firm in 1913 and was joined by his son Ivan in 1936. During the 1950s and 60s Ivan worked with leading jewellers such as Geoffrey Bellamy and Ernest Blyth to create a series of in-house collections. This ring is similar to pieces designed by Ernest Blyth during the early 1960s.