Concise 600 ST Circular Slide Rule
This presentation shows two versions of the Concise 600 ST. The first is a standard Sama & Etani 1969 version. The second is a special commissioned version by the ISRG as an memoral to Michael O'Leary.
600 OP Brochure (Overhead Projector Version)
Michael O'Leary Memorial Edition of the Concise 600 ST
