Collection of pages from K&E catalogs for the Webb's Stadia Slide Rules
The 4105 is a Stadia type slide rule in an unusal format. The body is a cylinder with a slider inside it.
From the 1903 catalog
The 4105 first appeared in the 1906 catalog of the catalogs that are currently available. It last appeared in the 1922 catalog.
Links to catalog pages for the 4105 Webb's Stadia slide rule:
Scans: Scans of a 4105