18k yellow gold double sided clip earrings 1960s

A pair of 18k yellow gold double sided clip earrings - each earring consisting of a flared domed shape with one side with a brushed satin Florentine finish and the other side polished and joined together with a sprung hinge - marked 18k- total weight of the pair 7.5grms - overall dimensions 20 x 14mm - c.1965 Australia