Full Details

Name and Model Number Merrifield Gunter Rule
Country of Origin USA
Date of Manufacture c.1850's
Front Scales see images
Back Scales see images
Scale Length 61 cm (24 inches)
Type of Rule Slide Rule
Construction Striped maple rule with brass edges. 61-cm x 4.5-cm
Area of Use Nautical
Comment Unusual brass-bound rule. Wood has orange-redish color with stripes. See closeup images. Needs dividers to make calculations. Signed Merrifield & Co. New-York
Rarity RRRR
Donor Collection of Ed Chamberlain
Match Number 375
(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.