5.2 Years 1900-1909

Number of slide rules: 12.

Year Maker Model
c.1900 K&E 4041
c.1900 K&E American
1900-1914 K&E 4054
c.1901 K&E 4041
1902-1912 Dietzgen 1765
1903 Faber 350
c.1904 Dietzgen 1762-B
c.1905 Dietzgen 1762-B
1905-1911 Kolesch 2574 Mannheim
1905-1911 Kolesch 2713 Stadia
1905-1911 Kolesch 2832 Triplex
1909 Stanley Fuller’s Calculator Model No. 1