Very nice early 20th century German 3 draw telescope, signed, ‘R. Treuer, Berlin. 41 Morenstrasse’.
It measures 9.75 inches closed and 29.5 inches fully open with a main doublet lens of just over 1.5 inches.
With lens cap, ray shade and eye-piece shutter.
With damage free lenses, it gives excellent images when viewed through.