Full Details

Name and Model Number Morse Decimalizer
Country of Origin USA
Date of Manufacture c. 1940
Front Scales Special decimal keeping; no log scale
Back Scales none
Scale Length n/a
Type of Rule Other
Construction Bent steel with plastic slide & bent copper cursor.
Area of Use Generic
Comment This is not a calculating slide rule. It is a device to keep track of
the position of the decimal point during calculations with a slide rule.
Rarity RR-RRR
Donor Collection of Ed Chamberlain
Match Number 174
(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.