Full Details

Name and Model Number Dimensator Reinforced
Concrete Calculator
Country of Origin Czechoslovakia
Date of Manufacture c. 1925 (?)
Front Scales Various
Back Scales Various
Scale Length Device is 18.5 cm long.
Type of Rule Other
Construction Lacquered paper scales on wood (?); celluloid cursor.
Area of Use Concrete
Comment Produced by the architect V. Kvasnička for reinforced concrete design calculations.
This is a Czech version copied from a German original devised by William Michaelis.
For more photos and info see http://www.nzeldes.com/HOC/Dimensator.htm
Rarity RRR
Donor Collection of Nathan Zeldes, Israel
Match Number 247
(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.