Full Details

Name and Model Number Slaterís rule
Country of Origin U.K.
Date of Manufacture ~1850 to early 20th century
Front Scales Soho slide rule scale variant
Back Scales Tables of weaving facts and figures
Scale Length 11"
Type of Rule Slide Rule
Construction Boxwood and brass
Area of Use Other
Comment A 2-foot, 2-fold rule used for textile and weaving calculations.
Slaterís rule has an incredible collection of information and instructions
engraved on the two sides (four legs) of the 2-2 rule, and examples are
known from a number of midlands makers.
This example by Gleave of Manchester dates it to about 1890, however it
has been stated that the majority come from either Preston or Rabone.
Rarity RR
Donor Collection of an English gentleman
Match Number 41

RR = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace.   
RRR = Very rare -- only very few known to collectors; may take several years before one comes up for sale.   
RRRR = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale.