Antique Scientific Instruments

Small spyglass telescope, early 19th c

Small spyglass telescope, early 19th c
Small spyglass telescope, early 19th c
Small spyglass telescope, early 19th c
Small spyglass telescope, early 19th c
Small spyglass telescope, early 19th c
Small spyglass telescope, early 19th c

Small spyglass telescope, early 19th c
An early 19th century single draw, two power eye-piece spyglass. The eye-piece has a small lever with markings'1 and 2' which changes the magnification approximately 4 x to 6 x power. It gives a clear image but limited field of view (not much different to a small set of opera glasses). (13 cms) and 3.5? (9 cms) when closed with an achromatic lens of 1? It has a screw-on lens cap.
Small spyglass telescope, early 19th c