Full Details

Name and Model Number Billeter National Rechenwalze.
System Billeter - 16 m
Country of Origin Switzerland
Date of Manufacture c. 1920
Front Scales Cylindrical C & D scales in 80 sections
Back Scales NONE
Scale Length 16-m
Type of Rule Cylinder
Construction Varnished paper scales on metal cylinder (16-cm dia. x 36.5-cm long) and on metal vanes on a sliding cylindrical sleeve. Metal support stand.
Area of Use Financial
Comment Formerly Julius Billeter Rechenwalze. This cylindrical slide rule has a metal support stand that could be wall mounted. Frequently used by European banks and accounting offices.
Rarity RR
Donor Collection of Ed Chamberlain
Match Number 112
(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.