Norma Ronda 100 Circular Slide Rule. Very nice. Hard to Find. Rechenscheibe.

Description

Norma Ronda 100 Circular Slide Rule, Rechenscheibe. Very nice. Hard to find.
This rule is in very good-to-excellent condition.  Gently used.  Cursor and disc both turn smoothly.
This is an elegant little slide rule. Easy-to-read.  It is called a "100" model because the rule has a 100 mm diameter (~ 4 inches).  There are a handful of gauge marks on the two scales, which are labeled "A" and "I" (corresponding to what are more commonly called the "C" and "D" scales).
The plastic case is included, and is in excellent condition.  The case has printed instructions on the reverse (in German).  No separate instructions are present, other than those printed on the case.
Satisfaction guaranteed! You may return the slide rule for a full refund for any reason, or no reason at all, within fourteen days. Purchaser pays return shipping.
Shipped within three business days, usually sooner.
All slide rules we ship are very securely packaged.  Most packaging is recycled.  We have shipped slide rules all over the world.  No purchaser has ever reported damage to a slide rule in transit.
Please ask if there are any questions.
International bidders are welcome!  Any import duties are the purchaser's responsibility.  The description and price will be accurately listed on the customs declaration when the rule is shipped.