A guilloché enamel cherub pendant and chain

triangular shaped pierced pendant with a central circular grey guilloché enamel double-sided plaque depicting to one side a cherub, to the other, a symmetrical pattern, length including bale 2.9cm, width 1.9cm, unmarked tested as 18ct gold, suspended from a French metalwares curb link chain, length 56cm, width 2.8mm, bolt ring clasp, French marks for 18ct gold, gross weight 17.3g