Full Details

Name and Model Number Faber-Castell 377
System Pickworth
Country of Origin Germany
Date of Manufacture 1909 - 1915
Front Scales A, B, C, D
Back Scales K in a window on the back side of the slide rule
Scale Length 25 cm
Type of Rule Slide Rule
Construction Celluloid on boxwood
Area of Use Generic
Comment Idea for position of K scale by Charles Pickworth.
Rarity RR
Donor Photo courtesy of Peter Holland, Germany
Match Number 43
(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.