Faber-Castell 20/45



Length 34 cm
Number of scales N.R.
Country of origin Germany
Country of manufacturing Germany
Year of manufacturing 19-sixties?
Status of the slide rule Near mint
Material of the slide rule Plastic+metal slides
Type of cursor N.R.
Status of the box Normal signs of use
Type of box N.R.
Status of the manual None
Collection number 99
Further comments This is a special calculator to calculate biorythms based on the day of birth. It is unclear why and for who FC made this calculator.On the bottom of the box you can find an extensive manual to use this calculator.

The box of the 20/45 is very similar to the boxes used by FC in the late sixties, early seventies for e.g. the 2/83N.


 Last updated: 04-09-2009