|Name and Model Number||Addiator |
|Country of Origin||Germany|
|Date of Manufacture||1920s?|
|Capacity||2 x 4 places|
|Area of Use||Other|
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.
|Donor||Photo from a collection in Germany|
(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.|