| 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 |
| Thumbnail (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. |