previous <<==>> next
NORMA GRAFIA ( 15 cm Diameter )
Have a look at the NORMA MERKURIA 190
NORMA / Germany (1960)
***************************************************************
SCALES of the NORMA » GRAFIA « CIRCULAR SLIDE RULE Model 190
===============================================================
( one-sided only )
X with lots of CONVERSION MARKS outer circles
---------------------------------------------------------------
X with lots of CONVERSION MARKS inner circles
REMARKS:
===============================================================
» Model 190 « because the OVER ALL DIAMETER equals 190 mm
The length of the scale is: 15 cm * π = 47 cm = 18 1/2 "
On the back side of the plastic cover is a SHORT INSTRUCTION,
refering to the "Grosse Gebrauchsanleitung" (= large manual )
of the » NORMA-RECHENSCHEIBE FUER DIE GRAFISCHE INDUSTRIE «
Historical Remarks ...
P O S T S C R I P T :
---------------------------------------------------------------
Found a 2nd NORMA »GRAFIA« Model 190 WITHOUT CURSOR ...
|
... made a MARKER OUT OF A PAPER CLIP