8 Dietzgen Vintage Slide Rule Manuals; Mannheim, 1786, 1744, 1738, 1725, 1739-L

Description

Dietzgen, Eight manuals: Free shipping in U.S. A.
Here’s a set of instruction manuals for Dietzgen Slide Rules. All of the manuals are in fair to good condition, some with bent pages and stains. But everything is very readable. Here is a brief description of each manual, in the same order as they appear in the main picture:
Mannheim Type. Two manuals and each has a copyright of 1925. They are both 80 pages. I suppose this manual would be useful and applicable for other manufacturer’s Mannheim-type rules too.
Model
1786, Decimal Trig Log Log type. It has a copyright of 1956. The cardboard cover has lost its stapled attachment to the pages. Oh, the ravages of time. It is 108 pages.
Model
1744, Polymath Multiplex Decimal Trig type. It has a copyright of 1959. It is 92 pages.
Model
1738, Multilog-Multiplex type. Two manuals.
They have copyrights of 1956 and 1954. They are both at 38 pages.
Model
1725, Vector Log Log type. It has a copyright of 1959. It is 155 pages.
Model  1739-L, Dietzgen Clear-Scale type. More like a pamphlet than a bound manual. It doesn’t have a copyright date. It is 15 pages.