Full Details

Name and Model Number Billeter, Julius
Rechenwalze - 4 m
Country of Origin Switzerland
Date of Manufacture c. 1900
Front Scales 20 - section C & D scales
Back Scales NONE
Scale Length 4-m
Type of Rule Cylinder
Construction Varnished paper scales on 5-cm dia. metal cylinder and on metal vanes on a sliding cylindrical sleeve. Wood support stand.
Area of Use Financial
Comment This is an early example matching Billeter's 1894 patent. Later examples carry "National Rechenwalze - System Billeter"
Rarity RRR
Donor Collection of Ed Chamberlain
Match Number 114
(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.