Faber-Castell 8/30 Circular Slide Rule. This is one of the few circular slide rules made by Faber Castell. It is much rarer than even the Faber-Castell 8/10 model. The rule is in nearly new condition, practically unused. The disc and cursor both turn very smoothly.
A minor defect: There is a texturing on part of the disc surface, which is visible when the light hits from certain angles, and not from other angles. The case is included, and is also nearly new. Also included are the German-language instructions.
Not something one sees every day. Please ask if there are any questions. The item "Faber-Castell 8/30 Circular Slide Rule. Rechenscheibe" is in sale since Thursday, November 14, 2019. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules".
The seller is "slide_rule_alley" and is located in Baton Rouge, Louisiana. This item can be shipped worldwide.