Brass sextant with polished brass diamond-pattern frame and limb, with wooden handle in fitted mahogany keystone case by John James Messer, London, England, 1845-55. Consists of inlaid polished silver 131° scale (-5° to 145°) with 15’ divisions and silver vernier (15”), four index-filter shades (red & green), three horizon filters (orange), scale magnifier on 90mm swivelling arm. Fitted with threaded telescope bracket for sighting telescopes (84mm – erect image & 146mm – inverted image) and sighting tube (83mm).
- Object Number:
- trade card
- furnishing and equipment
- measuring device - instrument
- component - object
- instrument component
- visual and verbal communication
- advertising card
- British Astronomical Association
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
View manifest in IIIF viewer
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.