Thermochrom Crayons (Pencils),. 1950-53
1950-1953
Circular slide rule for fuel calculations
Opisometer patented in France
1920-1950
Two examples of "TK -matic" technical drawing pencil
1979
Model 4/87 Rietz 20-inch slide rule by A.W.Faber-Castell
1955-1960
Slide rule model 334/82
1900-1986
Electrical engineering slide rule
1960-1965
A. W. Faber-Castell 57/89 slide rule
1965-1975
A. W. Faber-Castell two-foot slide rule
Slide rule by A.W. Faber-Castell
A. W. Faber-Castell 52/80 Mentor (10-inch) slide rule
1960-1970
A. W. Faber-Castell 2/82 Dulpex (10-inch) slide rule
1950-1960
A. W. Faber-Castell 67/554b Darnstadt (5-inch) slide rule
1960-1970
A. W. Faber-Castell 57/87 Rietz (10-inch) slide rule
1960-1970
A. W. Faber-Castell 1/60 (10-inch) slide rule
1957-1965