Full Details

Name and Model Number Palmer's Pocket Scale
Country of Origin USA
Date of Manufacture 1845
Front Scales Circular C & D
Back Scales none
Scale Length 20.4 cm. Scales include 12 gauge marks
Type of Rule Disc
Construction Cardboard and paper
Area of Use Generic
Comment Circular slide rule in on back page of booklet.
Rarity RRR
Donor Collection of Clay Castleberry
Match Number 256
(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.