Old navigational instruments. Vintage telescope, sextant and quadrant. 18th century. Museum of History and Navigation. Riga. Latvia Stock Photo - Alamy
2 ½ Inch Reflecting Telescope, Late 18th Century
18th Century brass theodolite, W&S Jones, Holborn, London, with swivel mounted telescope on turn
Scientific Collectables for 18th century antique Dollond telescopes
Reflecting Table Telescope, English, 18th century (brass and leather) by
The Short Telescope | Perspectives on History | AHA
Sold Price: AN 18TH C GREGORIAN BRASS TELESCOPE ATTR NAIRNE & BLUNT - February 6, 0122 10:00 AM CST
Lot 138 - A George III brass telescope
18th-Century Bone Telescopes Discovered in Amsterdam | Live Science
Sold Price: A mid-18th century 2 ¾ inch Gregorian reflecting telescope, signed John Bird, London. - January 2, 0121 11:00 AM GMT