I am selling a part of my collection. I offer an very rare french plastic slide rule GRAPHOPLEX 692a.The rule is in a very good condition - like new.  Included is a leather cover. Comes with instructions in french.

Front Scale (Extended scales)
LL00, L, T>45°, A [ B, T<45°, SRT, S C ] D, P, DI, LL0
Back Scale:
LL01, LL02, LL03, DF [ CF, CIF, K, CI, C ] D, LL3, LL2, LL1