Full Details

Name and Model Number Comptator Adding Machine
Country of Origin Germany
Date of Manufacture c. 1920
Capacity 13 digits
Construction metal
Area of Use Generic
Comment Stylus is inserted in toothed slides and moved downward for addition.
Size 60 x 205 x 32 mm. Weight 750 g. Has automatic carry mechanism.
Rarity RR
Donor Collection of Gary Flom
Match Number 392
(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.