Unusual and complex pocket slide rule by Aristo from Germany. This is the model 829 MultiTrig (not MultiRietz) and comes with:
- slide rule in great condition with hardly any signs of use
- it’s original Aristo signed leather pouch in great condition
- a manual in German in great condition for 829 MultiRietz (packaging mistake?)
- original cardboard outer box in great condition
- original paper control slip
The snug fitting box measures ca. 21 cm or 8 1/4 inches long, the rule measure 17,5 cm or 7 inches. See the attached video on how to work your vintage man tool : slide rule operation instructions!