Unknown Photographer c.1880s PHOTOGRAPHIC ENAMEL PORTRAITS, c.1880s, Circular/Oval 3/4 portraits (4), image size, smallest, approx 59mm x 47mm, and with rectangular examples (3), image size, largest, approx. 198mm x 120mm, sitters include, thespians, a member of the Catholic Church, Ladies & Gentlemen, all unsigned, total (6) The art of obtaining a burnt-in impression of a photograph on enamel or porcelain has been in practice since the 1850s.