FACIT ORIGINAL

http://w1.131.telia.com/~u13101111/facitcalc.html

http://www.xnumber.com/xnumber/facit_history.htm

http://www.rechenautomat.de/Facit/Facit.html

http://commons.wikimedia.org/wiki/File:Facit_mechanical_calculator.JPG

Bagian bawah