Smaller pocket slide rule by Aristo from Germany. This is the model 8xx and comes with:
- slide rule in very good condition, minimal signs of use or age (Commerz)
- it’s original Aristo signed leather pouch in great condition
- a manual in English in great condition (Commerce)
- original cardboard outer box in rougher condition, some tape (Commerz)
The box measures ca 21 cm or 8 1/4 inches, the rule itself ca. 16 cm or 6 1/4 inches long. See the attached video on how to work your vintage man tool : slide rule operation instructions!