Faber-Castell 20/66 Demegraph


Length 33 cm
Number of scales N.v.t.
Country of origin Germany
Country of manufacturing Germany
Year of manufacturing  
Status of the slide rule Normal signs of use
Material of the slide rule Clear plastic
Type of cursor None
Status of the box None
Status of the manual None
Collection number 119
Further comments I still have to sort out exactly how this device works. It is not a real slide rule, but some kind of device to count/measure typeface.


 Last updated: 04-09-2009