Late 18th/early 19th Century oval miniature portrait of a young gentleman with curled hair, wear

Late 18th/early 19th Century oval miniature portrait of a young gentleman with curled hair, wearing a brown jacket, on ivory, unsigned, the reverse with a fanned and jewelled locket of hair, on an opalescent background, in yellow metal frame and original leather covered case, 8cms x 7cms, (3" x 3.5").