Dollond Spyglass achromatic telescope,18thC.
The wooden barrel of this Galilean telescope is covered in dyed rayskin (shagreen), while the single draw tube is made of brass. A thumbwheel on the eyepiece allows the viewer to select one of two lenses of different magnifying powers. The lenses by the eye piece are numbered with 1 and 2. Length 11 cm with diameter of 4,7 cm. Extension 17 cm.