Full Details

Name and Model Number Belcher Brothers
Gunters Rule
Country of Origin USA, New York
Date of Manufacture 1850-1900
Front Scales Inches LEA Rhumbs ML Chords Sines Tan Tan
Back Scales Rhumbs t Rhumbsm Numbers Sines sinesm tan meridians equal parts
Scale Length 61 cm (24 inches)
Type of Rule Rule
Construction Boxwood, lines by a dividing engine, letters and numbers stamped by hand
Area of Use Generic
Comment Used for navigation, astronomy, surveying. A great device developed by gunter in the very early 1600s and a precursor to the slide rule
Rarity RRR
Donor Collection of Clay Castleberry
Match Number 352
(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.