Full Details

Name and Model Number Rotring
Reduktions-Rechenstab RS 10
Country of Origin Germany
Date of Manufacture Around 1970
Front Scales  
Back Scales  
Scale Length 15.5 cm
Type of Rule Other
Construction Scales painted on aluminium.
Area of Use Technical
Comment This reduction slide rule (Reduktions-Rechenstab) was meant to be affixed on
portable drawing boards made by Rotring (the company who bought over Aristo around 1978).
Rarity RR
Donor Photo from a collection in Belgium
Match Number 342
(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.