Vintage 1925 Mannheim Slide Rule Manual Eugene Dietzgen Drafting
I make my best effort to represent the item clearly, but colors can be slightly different in different lighting or objects may appear smaller/larger. Light wear.
Self-Teaching Instruction Manual for Dietzgen Maniphase Slide Rule
Undated booklet appears circa 1960s, good condition, light edge wear, light creasing, a few light pen "check marks" in text, complete, 14 pp, 5.25 X 8 in.