Full Details

Name and Model Number K & E 4101
Stadia Slide Rule
Country of Origin USA
Date of Manufacture Shown in catalogs of 1900-1901 early 1900s
Front Scales Unmarked stadia scles
Back Scales none
Scale Length 50 cm (20 Inches)
Type of Rule Slide Rule
Construction Celluloid on mahogany with an adjustable frame
Area of Use Topography
Comment Stadia surveying calculations, a long simple slide rule.
Rarity RRR
Donor Collection of Clay Castleberry
Match Number 285
(Click Picture for Details)

In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen
(1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD.
• RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
• RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale.
• RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale.