Full Details

Name and Model Number Addiator
Quick Multiplikator
Country of Origin Germany
Date of Manufacture 1920s?
Capacity 2 x 4 places
Construction Brass plate
Area of Use Other
Comment For multiplication.
The device gives all partial products to multiply two four
digit numbers, but unfortunately not in their proper positions.
Up to now a mention in historical literature is not known.
Rarity RRR
Donor Photo from a collection in Germany
Match Number 76
(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.