This is a telescope / monocular Starmor (12x / 24x / 48x) from the manufacturer Carl Zeiss Jena.
The first model of Starmor was produced between 1914 and 1921.
The serial number is 511, year of manufacture approx 1914.
The Starmor has an ocular - revolver eyepiece with the magnifications 12x, 24x and 48x as well as a lens diameter of 60mm.
At the lens end (80mm wide) there is a sun visor with a sighting device.
Presumably these models were already used in ww1.
The telescope is for his age in good condition (see pictures).
You have a sharp image and a good view
It has a a sighting device.
The telescope has a pull out sun shade (very difficulty to pull out).
This telescope is a absolute rarity (showcase, museum piece) and a must have for each collector.