Abney Level with 5x Magnification
Graduated 0 to ±90°, 0 to ±100% on a stationary arc.
Vernier reads to 10'.
Scale pointer has friction movement, locks with the turn of a thumbscrew
5x Magnification. Eyepiece slides out to focus crosshairs, bubble.
The objective lens slides out to focus on the target.
Stadia ratio 1 to 100. 7-1/2"L. Flat base, a brass tube with an aluminium arc.
With case has a belt loop & snap closure.