Addiator Faber-Castell 1/ 54 A Darmstadt
Addiator Rechenmaschinenfabrik, C. Kubler, Berlin, Germany
dimensions...........30 x 4,4 x 1,4 cm
weight..................170 g
material................wood/aluminium
digits....................6
it is a slide-rule with inside a Addiator Universal
Inside there is a pencil.