The Austrian maker Simon Georg Plössl made these Galilean telescopes before 1738. In many cases, they were signed “Plössl in Wien,” but there are some known examples, such as this one, of unsigned instruments. Similar telescopes signed by Plössl in Wien van be seen on the following links:
http://fp.optics.arizona.edu/antiques/telescope/Catalogue/T62/T62.htm
https://www.dorotheum.com/en/l/1935319/
https://www.cloudynights.com/gallery/image/115254-pl%C3%B6ssl-table-top-refractor/
The front lens is an achromatic doublet, and the four eyepieces on the revolver are negative focus singlets.
The telescope is generally in good condition with age scratches on the gilded
Read More...