Roplex Circular Slide Rule by Graphoplex of France. Unique & Scarce. Excellent.

Description

Roplex Circular Slide Rule by Graphoplex of France.
Unique & scarce.
10 scales. Side 1: C, D, A, B, CI  //  Side 2: K, S, L, T, S&T
Scales and cursor are operated with 2 knurled wheels on the
top corners of the instrument, labeled Curseur and Echelle.
On Side 1 are both Curseur and Echelle.  On Side 2 is Echelle.
Scales are finely divided for extra precision.
5" diameter and ¼"  thick.
The Graphoplex logo and name can be seen under Roplex on Side 2
This instrument is unique.  No other calculating device
operates in this manner.
It is a fine example of French instrument making ingenuity and precision.
Highly regarded by collectors.
This Roplex is in excellent condition. Operates smoothly.
Hard cardboard case is very nice. No damage.
Manual is 11 pages and is in good condition.
Payment is due via PayPal within 2 days from end of auction.
Buyer pays .70 shipping to USA address
via First Class Package.
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