Full Details

Name and Model Number Concise Stadia Slide Rule
Country of Origin Japan
Date of Manufacture Manufactured until the 1990's
Front Scales C C' S T1 T2 ST
Back Scales D sin cos cos sq
Scale Length 24 cm (9.5 inches) on the longest scale
Type of Rule Disc
Construction White plastic
Area of Use Topography
Comment Used for stadia formula calculations. It is amazing that this rule was still in producton in the 1990's while stadia sureveying pretty much went out in the 1950's and 1960's
Rarity RR
Donor Collection of Clay Castleberry
Match Number 363
(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.