Full Details

Name and Model Number Loftus Excise Rule
Country of Origin England
Date of Manufacture Unknown
Front Scales Specialty
Back Scales Specialty
Scale Length 5 3/8"
Type of Rule Slide Rule
Construction Bone (?), with silver alloy (?) end braces
Area of Use Brewing
Comment Overall length 6"
Rarity RR-RRR
Donor Collection of John Jarosz
Match Number 149
(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.