This J. Swift & son portable folding microscope is a very similar portable microscope to the previous one, manufactured under the No. 434 by the J. Swift & son house in London around 1906. It has three brass legs; Unlike the previous one that has them blacked, and that folds to be easily stored in its 11 x 8 x 17 cm leather case. Much smaller than the previous one despite the fact that the device has practically the same measurements. The 1/8, 1/6, 2/3, and 1-inch objectives are housed in the cap. Unlike the previous one, this one has only one objective. It has two x4 and x8 eyepieces. The entire apparatus is made of brass except for the optical tube which is nickel plated. It has an iris diaphragm optical condenser and a two-sided reflection mirror.