367: AN 18TH C GREGORIAN BRASS TELESCOPE ATTR NAIRNE & BLUNT

The unsigned Gregorian reflecting brass telescope attributed to NAIRNE & BLUNT of London has a 2 5/8 inch diameter main tube with speculum metal mirrors, turned eye tube having screw-on solar filter, a long screw-focusing mechanism directly to the secondary mirror, insertable aperture flange and screw-on dust cover. The instrument is mounted to a brass column with angular adjustment all raised on tripod stand with folding cabriole legs .
Measures 18.5 x 18 x 8.5 inches.
Very good condition, noting the dulling of the original lacquer finish. Good optics, there are no issues of damage or repair.
Provenance: The estate of a collector active in Historical Re-enactment, Surveying the Frontier, Scientific Instruments. Lewis and Clark.
$1,000 - $1,500