Full Details

Name and Model Number Farmars Wine & Spirit Merchants Rule made by Lucas
Country of Origin England
Date of Manufacture C1910 - 1914
Front Scales G/H,I/J
Back Scales A/B,C/D,E
Scale Length Approx 28cm.
Type of Rule Slide Rule
Construction Ebony and German Silver
Area of Use Brewing
Comment This is a most unusual variant of the Farmars Wine and Spirit Rule both in size and material,
with white letters on an ebony wood body, and celluloid and ebony cursor. It is more normally
found in either boxwood or with ivorene veneers on a mahogany base, and either in a much larger
or smaller size.
Rarity RRRR
Donor Collection of Lucas at TNMOC
Match Number 92

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.