Smaller pocket slide rule by Aristo from Germany. This is the model 810 Puck and comes with:
- slide rule in great condition
- it’s original Aristo signed leather pouch with metal clip in great condition
- a manual in German in great condition
- original cardboard outer box  in great condition
- original paper control slip
The box measures ca. 17 cm or 6 3/4 inches long, the rule itself only 12 cm or 4 inches long. See the attached video on how to work your vintage man tool : slide rule operation instructions!
