Collection of pages from K&E catalogs for the 4022 - 4024

Boucher Calculators


Catalog page from the 1895 catalog

Catalog page from the 1906 catalog

The 4022 - 4024 model numbers are for the Boucher Calculators. They are pocket watch style calculators. Ther various model numbers vary in features and construction techniques. The following products are in this group:


The 1743 1/2 was first shown in 1895. In the 1901 catalog the 4022 and 4024 were first shown. The last mention of the 4024 family is in the 1906 catalog. The following is a brief history of the 4024 family of slide rules as is told in the K&E catalogs that are available at this time. Exact timing is not possible because of the time between catalogs.

Links to catalog pages for the 4024 family of slide rules: