Monoculaire achromatique double puissance - Acajou, Laiton, Verre - Fin du XVIIIe siècle

Description
Monoculaire achromatique double puissance - Acajou, Laiton, Verre - Fin du XVIIIe siècle
Grande Bretagne

Rare achromatic Dual-Power monocular with originally store sleeve from the end of the 18th century. Monocular does have some wear, including some small shrinkage cracks in the mahogany shell. Viewer still works very well and gives a nice sharp image.
Sleeve is made of cardboard covered with a kind of canvas.
See also the pictures for the condition.

Operation monocular:
This monocular has two eye lenses in the eye piece. The eyepieces can be used one by one by rotating the eyepiece, making the necessary lens appear. On the brass tube of the viewer are two engraved lines, if the eyepiece and the viewer are pushed to the correct line, this gives the viewer a proper magnification and a clear picture (the lenses probably give a magnification of 3 and 6 x)
Monocular is not signed, but is of high and heavy quality. Special feature of this one is that it has a mahogany shell, most of such monoculars are completely made of brass.

Dimensions:
Length 10 cm
Length extended 15 cm
Diameter 4 cm.
The monocular will be packaged with care and shipped with registered mail.

Informations du lot
Objet
Monoculaire achromatique double puissance
Matériau
Acajou, Laiton, Verre
Période estimée
Fin du XVIIIe siècle
Pays d’origine
Grande Bretagne
État
Bon état - quelques usures et tâches dues à l’âge
Poids
200 g
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