1121457 Microscope, c.1690 (silver & glass) (see also 1121456-60) by Leeuwenhoek, Antoni van (1632-1723); Private Collection; (add.info.: The lens held between two riveted silver plates, stage with rounded step design, specimen pin and focusing screw, main screw with rounded handle, with angle bracket and securing screw, marked with an incuse 3 plates 3.9x2.2cm); Photo 穢 Christie\'s Images.