Full Details

Name and Model Number Soviet KLPZ 250-14
Country of Origin USSR
Date of Manufacture 1976 - 1978
Front Scales T1, K, A [B, CIF, CI, C] D, ST, S
Back Scales LL3, LL2, LL1, L plus tables of constants and examples
Scale Length 25 cm
Type of Rule Slide Rule
Construction Plastic
Area of Use Generic
Comment Made in Soviet KLPZ Factory for Calculating Instruments.
LOLD (Log-log duplex)slide rule (Modified Darmstadt).
This rule modifies the typical Darmstadt configuration by eliminating the P-scale
and adding a CIF-scale the front of the slide. The log-log scales move from slide
to the back upper stator.

Rarity RR
Donor Collection of Marion Moon, California
Match Number 303
(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.