This unknown manufacturer double-power telescope is a very rare small monocular. It has two achromatic lenses of two different magnifications. These two lenses have x 3 and x 6 magnifications and are switched by a quarter turn of the top edge. Then you have a second lens at the bottom of the tube. The body of the device measures 10 cm. tall and covered with a thin layer of mahogany. The bottom has a diameter of 4 cm. diameter. It has a cardboard sleeve.
In the component images of the pocket microscope, the focus mechanism is extended to the maximum, the focus is reduced to its minimum, and the magnifying lens shift mechanism in action