19th c. French O/c portrait of a young lady

French School oil on canvas one-quarter length portrait of a young lady, 19th century, wearing mid 18th century fashionable dress, having a raised powdered wig with strung pearl ornaments, and wearing a blue dress with white muslin fichu around her shoulders pinned with a pink breast bow, having no apparent signature, 23.5"h x 19.5"w, overall size with frame 30.75"h x 26.5"w x 2.5"d.