DIWA, Gentofte / Denmark (1960) *************************************************************** S C A L E S of the D I W A POCKET-RIETZ Model 621 =============================================================== Front Side [ inverse / RED ] Back Side =============================================================== ( 0 ... 5" Ruler ) K X3 A X2 --------------------------------------------------------------- B X2 S sin(0.1X) [CI] [1/X] ST arc(0.01X) C X T tan(0.1X) --------------------------------------------------------------- D X L lgX ( 0 ... 13 cm Ruler ) R E M A R K S : ( 1° = 60' ; 1' = 60" ) =============================================================== The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS The "DIWA"-Logo is placed on the back side of the slider. This Pocket SR came with a brown leather case. It was a gift of the » SKF « Ball Bearing Company. Its LOGO is printed on the back side of the SlideRule and on its leather case. Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 12/22/12 |