Four portrait miniatures

Four portrait miniatures, including an oval miniature portrait of a rural scene, probably Swiss, with a Shepherd and three sheep in the foreground, village buildings in the centre and snow-capped mountains in the distance, in gilt metal frame, 8.5cm wide, an 18th century miniature portrait of a lady with pink dress, probably painted on ivory, a miniature painting of a woman in the Renaissance style wearing a red dress and head dress, painted on ivory, two-colour gold frame with foliate chased border within blue enamel surround, 5.5cm high, a circular miniature painting depicting a scene of revelers in the 18th century style, painted in enamel on porcelain within an ornate gold frame, 3.5cm high