Split-lens eyepiece position micrometer with spherical crystal micrometer and eyepiece dynameter

Made:
1820-1830 in London
maker:
George Dollond

Split-lens eyepiece position micrometer with spherical crystal micrometer and eyepiece dynameter, all by George Dollond, London in fitted mahogany box, 1820-1830.

Details

Category:
Astronomy
Object Number:
1994-496
Materials:
brass, glass, mahogany and complete
Measurements:
overall (cae): 85 x 165 x 100 mm
type:
crystal micrometer, split-lens eyepiece micrometer and dynameter
credit:
Tesseract

Parts