[Lithophanes] Set of four semi-translucent white porcelain panels
Each 13 x 11 cm., each w. scene in relief, signed and numbered verso "HPM 31", "HPM 33", "HPM 30" (Hennebergsche Porzellan Manufaktur) and "PPM 725" (Prensaich Porzellan Manufaktur), ca. 1880, framed together in 1 lead frame.
Very nice panels, meant to be held against the light to reveal its images, which appear in various shades of grey in astonishing detail (total 4 in 1 frame).