Large and interesting pocket slide rule by Aristo from Germany. This is the model 869 and comes with:
- slide rule in great condition in great condition (only minimal fading of yellow)
- it’s original Aristo signed leather pouch in great condition
- original cardboard outer box in a little rougher shape but almost complete
- original paper control slip
The snug fitting box measures ca. 21 cm or 8 1/4 inches long, the rule itself 20 cm or 8 inches. See the attached video on how to work your vintage man tool : slide rule operation instructions!
