Full Details

Name and Model Number Dick Tracy
Code Maker Slide Rule
Country of Origin USA
Date of Manufacture Estimate 1950-1960
Front Scales Code letter and number scales
Back Scales None
Scale Length 12.5 cm (5 inches)
Type of Rule Slide Rule
Construction Printed on wood
Area of Use Conversion
Comment Code encryption and de-crypton scales. A popular rule for young detectives.
Rarity RR
Donor Collection of Clay Castleberry
Match Number 294
(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.